v3.26.1
Shareholder Report
 6 Months Ended
Feb. 28, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name SEI TAX EXEMPT TRUST
Entity Central Index Key 0000701817
Entity Investment Company Type N-1A
Document Period End Date Feb. 28, 2026
C000017636  
Shareholder Report [Line Items]  
Fund Name Intermediate-Term Municipal Fund
Class Name Class F
Trading Symbol SEIMX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the Intermediate-Term Municipal Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Intermediate-Term Municipal Fund, Class F Shares
$32
0.63%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63%
AssetsNet $ 1,589,122,000
Holdings Count | Holding 861
Advisory Fees Paid, Amount $ 1,486
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$1,589,122
861
$1,486
9%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Board Bank Revenue
0.1%
Public Facilities
0.1%
Pollution Control
0.2%
Cash Equivalent
0.4%
Utilities
1.6%
Nursing Homes
3.2%
Industrial Development
3.2%
Tobacco
3.4%
Power
4.7%
Housing
5.2%
Transportation
5.3%
Water
6.3%
Airports
8.5%
General Obligations
10.5%
Education
10.7%
Health Care
11.5%
General Revenue
24.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Southeast Alabama, Energy Authority, Ser E
5.000%
10/01/30
0.7%
Wisconsin State, Public Finance Authority, Duke Energy Progress Project
3.700%
10/01/46
0.7%
New Jersey State, Tobacco Settlement Financing, Ser A
5.000%
06/01/35
0.7%
Massachusetts State, Development Finance Agency, Beth Israel Lahey Health
5.250%
07/01/44
0.6%
Pennsylvania State, Economic Development Financing Authority, PENNDOT Major Bridges Project, AMT
5.000%
06/30/34
0.6%
Atlanta, Water & Wastewater Revenue Authority, Sub-Ser, BAM
5.000%
11/01/32
0.6%
Virginia State, Tobacco Settlement Financing, Sub-Ser C
0.000%
06/01/47
0.6%
Puerto Rico, Sales Tax Financing, Sales Tax Revenue, Ser A-1
4.550%
07/01/40
0.5%
Southeast Alabama, Energy Authority, Cooperative District, Ser B
5.000%
09/01/33
0.5%
Texas State, Municipal Gas Acquisition & Supply IV, Ser B
5.500%
01/01/54
0.5%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147417  
Shareholder Report [Line Items]  
Fund Name Intermediate-Term Municipal Fund
Class Name Class Y
Trading Symbol SINYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the Intermediate-Term Municipal Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Intermediate-Term Municipal Fund, Class Y Shares
$19
0.38%
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.38%
AssetsNet $ 1,589,122,000
Holdings Count | Holding 861
Advisory Fees Paid, Amount $ 1,486
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$1,589,122
861
$1,486
9%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Board Bank Revenue
0.1%
Public Facilities
0.1%
Pollution Control
0.2%
Cash Equivalent
0.4%
Utilities
1.6%
Nursing Homes
3.2%
Industrial Development
3.2%
Tobacco
3.4%
Power
4.7%
Housing
5.2%
Transportation
5.3%
Water
6.3%
Airports
8.5%
General Obligations
10.5%
Education
10.7%
Health Care
11.5%
General Revenue
24.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Southeast Alabama, Energy Authority, Ser E
5.000%
10/01/30
0.7%
Wisconsin State, Public Finance Authority, Duke Energy Progress Project
3.700%
10/01/46
0.7%
New Jersey State, Tobacco Settlement Financing, Ser A
5.000%
06/01/35
0.7%
Massachusetts State, Development Finance Agency, Beth Israel Lahey Health
5.250%
07/01/44
0.6%
Pennsylvania State, Economic Development Financing Authority, PENNDOT Major Bridges Project, AMT
5.000%
06/30/34
0.6%
Atlanta, Water & Wastewater Revenue Authority, Sub-Ser, BAM
5.000%
11/01/32
0.6%
Virginia State, Tobacco Settlement Financing, Sub-Ser C
0.000%
06/01/47
0.6%
Puerto Rico, Sales Tax Financing, Sales Tax Revenue, Ser A-1
4.550%
07/01/40
0.5%
Southeast Alabama, Energy Authority, Cooperative District, Ser B
5.000%
09/01/33
0.5%
Texas State, Municipal Gas Acquisition & Supply IV, Ser B
5.500%
01/01/54
0.5%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000017624  
Shareholder Report [Line Items]  
Fund Name Short Duration Municipal Fund
Class Name Class F
Trading Symbol SUMAX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the Short Duration Municipal Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Short Duration Municipal Fund, Class F Shares
$32
0.63%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63%
AssetsNet $ 740,340,000
Holdings Count | Holding 502
Advisory Fees Paid, Amount $ 737
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$740,340
502
$737
16%
Holdings [Text Block]

Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Public Facilities
0.1%
Board Bank Revenue
0.1%
Nursing Homes
0.4%
Airports
1.6%
Pollution Control
1.7%
Utilities
2.4%
Power
2.7%
Water
2.8%
Transportation
3.1%
Industrial Development
5.4%
Health Care
9.9%
Education
10.4%
General Obligations
14.1%
General Revenue
21.3%
Housing
25.1%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net Assets
Kentucky State, Public Energy Authority, Ser A
5.250%
06/01/55
2.5%
City of Andover Kansas, Ser A
3.500%
10/01/28
1.4%
District of Columbia, Ser C
0.000%
06/01/51
1.4%
Dallas City, Housing Finance Corporation, Multifamily Housing Revenue, Waterford at Goldmark
3.300%
01/01/43
1.2%
Tennergy
5.000%
10/01/54
1.1%
Alachua County, Housing Finance Authority
3.300%
12/01/29
1.0%
Salt Verde Financial Corp, Gas Revenue
5.250%
12/01/27
1.0%
Southeast Alabama, Energy Authority, Ser E
5.000%
10/01/30
1.0%
Metrowest Regional Transit Authority, COMWLTH APPROP
3.375%
09/11/26
0.9%
Georgia State, Main Street Natural Gas, Ser A
5.000%
05/01/54
0.9%
C000147411  
Shareholder Report [Line Items]  
Fund Name Short Duration Municipal Fund
Class Name Class Y
Trading Symbol SHYMX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the Short Duration Municipal Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Short Duration Municipal Fund, Class Y Shares
$19
0.38%
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.38%
AssetsNet $ 740,340,000
Holdings Count | Holding 502
Advisory Fees Paid, Amount $ 737
InvestmentCompanyPortfolioTurnover 16.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$740,340
502
$737
16%
Holdings [Text Block]

Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Public Facilities
0.1%
Board Bank Revenue
0.1%
Nursing Homes
0.4%
Airports
1.6%
Pollution Control
1.7%
Utilities
2.4%
Power
2.7%
Water
2.8%
Transportation
3.1%
Industrial Development
5.4%
Health Care
9.9%
Education
10.4%
General Obligations
14.1%
General Revenue
21.3%
Housing
25.1%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net Assets
Kentucky State, Public Energy Authority, Ser A
5.250%
06/01/55
2.5%
City of Andover Kansas, Ser A
3.500%
10/01/28
1.4%
District of Columbia, Ser C
0.000%
06/01/51
1.4%
Dallas City, Housing Finance Corporation, Multifamily Housing Revenue, Waterford at Goldmark
3.300%
01/01/43
1.2%
Tennergy
5.000%
10/01/54
1.1%
Alachua County, Housing Finance Authority
3.300%
12/01/29
1.0%
Salt Verde Financial Corp, Gas Revenue
5.250%
12/01/27
1.0%
Southeast Alabama, Energy Authority, Ser E
5.000%
10/01/30
1.0%
Metrowest Regional Transit Authority, COMWLTH APPROP
3.375%
09/11/26
0.9%
Georgia State, Main Street Natural Gas, Ser A
5.000%
05/01/54
0.9%
C000017631  
Shareholder Report [Line Items]  
Fund Name California Municipal Bond Fund
Class Name Class F
Trading Symbol SBDAX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the California Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
California Municipal Bond Fund, Class F Shares
$31
0.60%
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.60%
AssetsNet $ 228,489,000
Holdings Count | Holding 133
Advisory Fees Paid, Amount $ 271
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$228,489
133
$271
7%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Tobacco
0.2%
Cash Equivalent
0.5%
Utilities
0.8%
Pollution Control
0.9%
Transportation
2.0%
Water
2.8%
Nursing Homes
3.2%
Housing
3.8%
Power
6.6%
Airports
8.7%
Health Care
12.3%
Education
16.0%
General Obligations
17.6%
General Revenue
23.6%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Los Angeles, Department of Water & Power, Water System Revenue, Ser E
5.000%
07/01/35
3.2%
California State
5.000%
10/01/35
2.6%
Los Angeles, Unified School District, Ser A
5.000%
07/01/31
2.5%
California State, Community Choice Financing Authority, Clean Energy Project, Ser B-1
4.000%
02/01/52
2.3%
California State
5.000%
11/01/31
2.2%
Burbank-Glendale-Pasadena Airport Authority Brick Campaign, Ser B, AMT
5.000%
07/01/32
2.1%
California State
4.000%
08/01/34
2.0%
California State, Various Purpose
5.000%
10/01/29
1.9%
California State, Statewide Communities Development Authority, Kaiser Permanente Project, Ser 2004-M
5.000%
04/01/38
1.9%
California State, Health Facilities Financing Authority, Kaiser Permanente Project, Ser 2006-C
5.000%
06/01/41
1.9%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147416  
Shareholder Report [Line Items]  
Fund Name California Municipal Bond Fund
Class Name Class Y
Trading Symbol SCYYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the California Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
California Municipal Bond Fund, Class Y Shares
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
AssetsNet $ 228,489,000
Holdings Count | Holding 133
Advisory Fees Paid, Amount $ 271
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$228,489
133
$271
7%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Tobacco
0.2%
Cash Equivalent
0.5%
Utilities
0.8%
Pollution Control
0.9%
Transportation
2.0%
Water
2.8%
Nursing Homes
3.2%
Housing
3.8%
Power
6.6%
Airports
8.7%
Health Care
12.3%
Education
16.0%
General Obligations
17.6%
General Revenue
23.6%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Los Angeles, Department of Water & Power, Water System Revenue, Ser E
5.000%
07/01/35
3.2%
California State
5.000%
10/01/35
2.6%
Los Angeles, Unified School District, Ser A
5.000%
07/01/31
2.5%
California State, Community Choice Financing Authority, Clean Energy Project, Ser B-1
4.000%
02/01/52
2.3%
California State
5.000%
11/01/31
2.2%
Burbank-Glendale-Pasadena Airport Authority Brick Campaign, Ser B, AMT
5.000%
07/01/32
2.1%
California State
4.000%
08/01/34
2.0%
California State, Various Purpose
5.000%
10/01/29
1.9%
California State, Statewide Communities Development Authority, Kaiser Permanente Project, Ser 2004-M
5.000%
04/01/38
1.9%
California State, Health Facilities Financing Authority, Kaiser Permanente Project, Ser 2006-C
5.000%
06/01/41
1.9%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000017627  
Shareholder Report [Line Items]  
Fund Name Massachusetts Municipal Bond Fund
Class Name Class F
Trading Symbol SMAAX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the Massachusetts Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Massachusetts Municipal Bond Fund, Class F Shares
$33
0.64%
Expenses Paid, Amount $ 33
Expense Ratio, Percent 0.64%
AssetsNet $ 61,824,000
Holdings Count | Holding 72
Advisory Fees Paid, Amount $ 79
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$61,824
72
$79
9%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Cash Equivalent
0.8%
Nursing Homes
1.7%
Housing
2.0%
Power
3.6%
Water
5.5%
Airports
7.4%
General Revenue
7.4%
Transportation
8.0%
General Obligations
16.3%
Health Care
20.6%
Education
25.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Massachusetts State, Development Finance Agency, Children's Hospital, Ser T
5.000%
03/01/34
5.8%
Massachusetts State, Ser C
5.000%
10/01/33
4.7%
Massachusetts Bay, Transportation Authority, Ser A
5.000%
07/01/36
3.0%
Boston, Ser A
4.000%
11/01/31
2.6%
Massachusetts State, Development Finance Agency, Harvard University, Ser B
4.000%
02/15/36
2.3%
Massachusetts State, Development Finance Agency, Babson College
5.000%
10/01/33
2.1%
Massachusetts State, Development Finance Agency, Amherst College
5.000%
11/01/55
2.0%
Massachusetts Development Finance Agency, Ser N
5.000%
07/01/37
1.9%
Massachusetts Development Finance Agency, Ser F
5.000%
07/01/38
1.9%
Massachusetts Bay, Transportation Authority Sales Tax Revenue, Ser B
5.000%
07/01/37
1.9%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147413  
Shareholder Report [Line Items]  
Fund Name Massachusetts Municipal Bond Fund
Class Name Class Y
Trading Symbol SMSYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the Massachusetts Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Massachusetts Municipal Bond Fund, Class Y Shares
$25
0.49%
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.49%
AssetsNet $ 61,824,000
Holdings Count | Holding 72
Advisory Fees Paid, Amount $ 79
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$61,824
72
$79
9%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Cash Equivalent
0.8%
Nursing Homes
1.7%
Housing
2.0%
Power
3.6%
Water
5.5%
Airports
7.4%
General Revenue
7.4%
Transportation
8.0%
General Obligations
16.3%
Health Care
20.6%
Education
25.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Massachusetts State, Development Finance Agency, Children's Hospital, Ser T
5.000%
03/01/34
5.8%
Massachusetts State, Ser C
5.000%
10/01/33
4.7%
Massachusetts Bay, Transportation Authority, Ser A
5.000%
07/01/36
3.0%
Boston, Ser A
4.000%
11/01/31
2.6%
Massachusetts State, Development Finance Agency, Harvard University, Ser B
4.000%
02/15/36
2.3%
Massachusetts State, Development Finance Agency, Babson College
5.000%
10/01/33
2.1%
Massachusetts State, Development Finance Agency, Amherst College
5.000%
11/01/55
2.0%
Massachusetts Development Finance Agency, Ser N
5.000%
07/01/37
1.9%
Massachusetts Development Finance Agency, Ser F
5.000%
07/01/38
1.9%
Massachusetts Bay, Transportation Authority Sales Tax Revenue, Ser B
5.000%
07/01/37
1.9%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000017630  
Shareholder Report [Line Items]  
Fund Name New Jersey Municipal Bond Fund
Class Name Class F
Trading Symbol SENJX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the New Jersey Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Jersey Municipal Bond Fund, Class F Shares
$30
0.60%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
AssetsNet $ 94,063,000
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 106
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$94,063
83
$106
4%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Water
1.2%
Cash Equivalent
1.6%
Housing
1.6%
Industrial Development
3.3%
Tobacco
3.9%
General Obligations
6.3%
Airports
7.9%
Transportation
13.9%
Health Care
14.9%
Education
19.9%
General Revenue
24.7%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Tobacco Settlement Financing, Ser A
5.000%
06/01/34
3.3%
New Jersey State, Transportation Trust Fund Authority, Ser S
5.000%
06/15/32
3.0%
New Jersey State, Transportation Trust Fund Authority, Ser A
4.000%
06/15/35
2.9%
New Jersey State, Higher Education Student Assistance Authority, Ser A, AMT
5.000%
12/01/33
2.8%
New York & New Jersey, Port Authority, AMT
5.000%
11/01/32
2.8%
New York & New Jersey, Port Authority, Ser 223, AMT
5.000%
07/15/33
2.5%
New Jersey State, Educational Facilities Authority, Ser A1
5.000%
03/01/37
2.5%
New Jersey State, Health Care Facilities Financing Authority, RWJ Barnabas Health Obligated Group
5.000%
07/01/36
2.5%
New Jersey State, Educational Facilities Authority, Montclair State University, Ser B
5.000%
07/01/28
2.4%
New Jersey State, COVID-19 Emergency Bonds
4.000%
06/01/31
2.3%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147415  
Shareholder Report [Line Items]  
Fund Name New Jersey Municipal Bond Fund
Class Name Class Y
Trading Symbol SNJYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the New Jersey Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New Jersey Municipal Bond Fund, Class Y Shares
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
AssetsNet $ 94,063,000
Holdings Count | Holding 83
Advisory Fees Paid, Amount $ 106
InvestmentCompanyPortfolioTurnover 4.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$94,063
83
$106
4%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Water
1.2%
Cash Equivalent
1.6%
Housing
1.6%
Industrial Development
3.3%
Tobacco
3.9%
General Obligations
6.3%
Airports
7.9%
Transportation
13.9%
Health Care
14.9%
Education
19.9%
General Revenue
24.7%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Tobacco Settlement Financing, Ser A
5.000%
06/01/34
3.3%
New Jersey State, Transportation Trust Fund Authority, Ser S
5.000%
06/15/32
3.0%
New Jersey State, Transportation Trust Fund Authority, Ser A
4.000%
06/15/35
2.9%
New Jersey State, Higher Education Student Assistance Authority, Ser A, AMT
5.000%
12/01/33
2.8%
New York & New Jersey, Port Authority, AMT
5.000%
11/01/32
2.8%
New York & New Jersey, Port Authority, Ser 223, AMT
5.000%
07/15/33
2.5%
New Jersey State, Educational Facilities Authority, Ser A1
5.000%
03/01/37
2.5%
New Jersey State, Health Care Facilities Financing Authority, RWJ Barnabas Health Obligated Group
5.000%
07/01/36
2.5%
New Jersey State, Educational Facilities Authority, Montclair State University, Ser B
5.000%
07/01/28
2.4%
New Jersey State, COVID-19 Emergency Bonds
4.000%
06/01/31
2.3%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000017629  
Shareholder Report [Line Items]  
Fund Name New York Municipal Bond Fund
Class Name Class F
Trading Symbol SENYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the New York Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New York Municipal Bond Fund, Class F Shares
$30
0.60%
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60%
AssetsNet $ 112,845,000
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 127
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$112,845
75
$127
9%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Nursing Homes
0.3%
Utilities
1.3%
Cash Equivalent
1.5%
Tobacco
2.1%
Power
3.4%
Water
3.6%
Housing
3.7%
General Obligations
4.0%
Industrial Development
5.1%
Transportation
11.5%
Health Care
12.1%
Airports
13.6%
General Revenue
18.3%
Education
18.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
New York & New Jersey, Port Authority, AMT
5.000%
11/01/30
3.9%
Triborough, Bridge & Tunnel Authority, MTA Bridges & Tunnels, Sub-Ser A
5.000%
02/01/28
3.1%
New York City Transitional Finance Authority Future Tax Secured Revenue, Sub-Ser S
5.000%
02/01/39
3.1%
New York City Transitional Finance Authority Future Tax Secured Revenue, Future Tax Secured, Sub-Ser
5.000%
05/01/37
2.3%
New York City, Transitional Finance Authority, Building Aid, Sub-Ser S-3, ST AID WITHHLDG
5.000%
07/15/32
2.3%
New York State, Dormitory Authority, School Districts Financing Program, Ser A, ST AID WITHHLDG
5.000%
10/01/29
2.3%
Triborough, Bridge & Tunnel Authority, MTA Bridges & Tunnels
5.000%
12/01/37
2.1%
Suffolk, Tobacco Asset Securitization
4.000%
06/01/35
2.1%
New York State, Dormitory Authority, Presbyterian Hospital Obligated Group
5.000%
08/01/35
2.1%
Metropolitan Transportation Authority
5.000%
11/15/32
2.1%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147414  
Shareholder Report [Line Items]  
Fund Name New York Municipal Bond Fund
Class Name Class Y
Trading Symbol SNYYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the New York Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
New York Municipal Bond Fund, Class Y Shares
$23
0.45%
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.45%
AssetsNet $ 112,845,000
Holdings Count | Holding 75
Advisory Fees Paid, Amount $ 127
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$112,845
75
$127
9%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Nursing Homes
0.3%
Utilities
1.3%
Cash Equivalent
1.5%
Tobacco
2.1%
Power
3.4%
Water
3.6%
Housing
3.7%
General Obligations
4.0%
Industrial Development
5.1%
Transportation
11.5%
Health Care
12.1%
Airports
13.6%
General Revenue
18.3%
Education
18.5%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
New York & New Jersey, Port Authority, AMT
5.000%
11/01/30
3.9%
Triborough, Bridge & Tunnel Authority, MTA Bridges & Tunnels, Sub-Ser A
5.000%
02/01/28
3.1%
New York City Transitional Finance Authority Future Tax Secured Revenue, Sub-Ser S
5.000%
02/01/39
3.1%
New York City Transitional Finance Authority Future Tax Secured Revenue, Future Tax Secured, Sub-Ser
5.000%
05/01/37
2.3%
New York City, Transitional Finance Authority, Building Aid, Sub-Ser S-3, ST AID WITHHLDG
5.000%
07/15/32
2.3%
New York State, Dormitory Authority, School Districts Financing Program, Ser A, ST AID WITHHLDG
5.000%
10/01/29
2.3%
Triborough, Bridge & Tunnel Authority, MTA Bridges & Tunnels
5.000%
12/01/37
2.1%
Suffolk, Tobacco Asset Securitization
4.000%
06/01/35
2.1%
New York State, Dormitory Authority, Presbyterian Hospital Obligated Group
5.000%
08/01/35
2.1%
Metropolitan Transportation Authority
5.000%
11/15/32
2.1%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000017626  
Shareholder Report [Line Items]  
Fund Name Pennsylvania Municipal Bond Fund
Class Name Class F
Trading Symbol SEPAX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the Pennsylvania Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Pennsylvania Municipal Bond Fund, Class F Shares
$32
0.63%
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.63%
AssetsNet $ 138,181,000
Holdings Count | Holding 112
Advisory Fees Paid, Amount $ 182
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$138,181
112
$182
6%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Cash Equivalent
0.3%
Industrial Development
0.7%
Public Facilities
1.6%
Housing
1.8%
Tobacco
2.3%
Airports
3.2%
Utilities
3.6%
Nursing Homes
4.6%
Water
10.2%
General Revenue
10.5%
General Obligations
11.3%
Transportation
12.4%
Health Care
17.6%
Education
19.1%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Philadelphia, Industrial Development Authority, The Children's Hospital of Philadelphia Project
4.000%
07/01/35
3.9%
Pennsylvania State, BAM
4.000%
03/01/35
2.6%
Pennsylvania State, Higher Education Assistance Agency, Ser A, AMT
5.000%
06/01/32
2.4%
Pennsylvania State
5.000%
09/01/32
2.2%
Philadelphia, Water & Wastewater Revenue Authority, Ser C, AGC
5.000%
09/01/35
2.2%
Philadelphia, Housing Authority, PHADC Acquisition Program
5.250%
03/01/38
2.1%
Adams County, General Authority, The Brethren Home Community
5.000%
06/01/34
2.0%
Commonwealth Financing Authority, Tobacco Master Settlement
5.000%
06/01/28
1.9%
Allegheny County, Hospital Development Authority, Allegheny Health Network
5.000%
04/01/28
1.9%
Philadelphia, Water & Wastewater Revenue Authority, Ser C
5.000%
10/01/31
1.8%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147412  
Shareholder Report [Line Items]  
Fund Name Pennsylvania Municipal Bond Fund
Class Name Class Y
Trading Symbol SPAYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the Pennsylvania Municipal Bond Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Pennsylvania Municipal Bond Fund, Class Y Shares
$24
0.48%
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.48%
AssetsNet $ 138,181,000
Holdings Count | Holding 112
Advisory Fees Paid, Amount $ 182
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$138,181
112
$182
6%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Cash Equivalent
0.3%
Industrial Development
0.7%
Public Facilities
1.6%
Housing
1.8%
Tobacco
2.3%
Airports
3.2%
Utilities
3.6%
Nursing Homes
4.6%
Water
10.2%
General Revenue
10.5%
General Obligations
11.3%
Transportation
12.4%
Health Care
17.6%
Education
19.1%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
Philadelphia, Industrial Development Authority, The Children's Hospital of Philadelphia Project
4.000%
07/01/35
3.9%
Pennsylvania State, BAM
4.000%
03/01/35
2.6%
Pennsylvania State, Higher Education Assistance Agency, Ser A, AMT
5.000%
06/01/32
2.4%
Pennsylvania State
5.000%
09/01/32
2.2%
Philadelphia, Water & Wastewater Revenue Authority, Ser C, AGC
5.000%
09/01/35
2.2%
Philadelphia, Housing Authority, PHADC Acquisition Program
5.250%
03/01/38
2.1%
Adams County, General Authority, The Brethren Home Community
5.000%
06/01/34
2.0%
Commonwealth Financing Authority, Tobacco Master Settlement
5.000%
06/01/28
1.9%
Allegheny County, Hospital Development Authority, Allegheny Health Network
5.000%
04/01/28
1.9%
Philadelphia, Water & Wastewater Revenue Authority, Ser C
5.000%
10/01/31
1.8%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000047166  
Shareholder Report [Line Items]  
Fund Name Tax-Advantaged Income Fund
Class Name Class F
Trading Symbol SEATX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class F Shares of the Tax-Advantaged Income Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Tax-Advantaged Income Fund, Class F Shares
$44
0.86%
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.86%
AssetsNet $ 824,532,000
Holdings Count | Holding 441
Advisory Fees Paid, Amount $ 1,492
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$824,532
441
$1,492
14%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Cash Equivalent
0.3%
0.4%
Board Bank Revenue
0.4%
Pollution Control
0.7%
Airports
1.1%
Mortgage-Backed Securities
1.3%
Transportation
1.3%
Power
2.1%
General Obligations
2.8%
Preferred Stock
3.4%
Health Care
3.4%
Water
3.5%
U.S. Treasury Obligations
5.6%
Nursing Homes
5.7%
Education
6.8%
Tobacco
7.0%
Industrial Development
8.2%
Housing
9.6%
General Revenue
14.3%
Corporate Obligations
21.7%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
United States Treasury Bill
3.632%
06/02/26
1.7%
Puerto Rico, Sub-Ser Senior
0.000%
11/01/51
1.5%
Texas State, Water Development Board, Ser A
4.875%
10/15/48
1.3%
Puerto Rico, Sales Tax Financing, Sales Tax Revenue, Ser A1
0.000%
07/01/51
1.3%
United States Treasury Bill
3.635%
05/21/26
1.2%
Take Back and Exit Facility
8.500%
10/21/27
1.1%
North Fort Bend Water Authority, Ser A
4.000%
12/15/44
1.0%
Puerto Rico, GDB Debt Recovery Authority
7.500%
08/20/40
1.0%
M-S-R, Energy Authority, Ser C
6.500%
11/01/39
0.9%
West Virginia State, Tobacco Settlement, Finance Authority, Ser B
0.000%
06/01/47
0.9%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.
C000147418  
Shareholder Report [Line Items]  
Fund Name Tax-Advantaged Income Fund
Class Name Class Y
Trading Symbol STAYX
Annual or Semi-Annual Statement [Text Block] Semi-Annual Shareholder Report
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] This semi-annual shareholder report contains important information about Class Y Shares of the Tax-Advantaged Income Fund (the "Fund") for the period from September 1, 2025 to February 28, 2026. You can find additional information about the Fund at https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports. You can also request this information by contacting us at (610) 676-1000.
Additional Information Phone Number (610) 676-1000
Additional Information Website https://www.seic.com/mutual-fund-documentation/prospectuses-and-reports
Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment) 

Table Summary
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Tax-Advantaged Income Fund, Class Y Shares
$31
0.61%
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.61%
AssetsNet $ 824,532,000
Holdings Count | Holding 441
Advisory Fees Paid, Amount $ 1,492
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of February 28, 2026

Table Summary
Total Net Assets (000's)
Number of Holdings
Total Advisory Fees Paid (000's)
Portfolio Turnover Rate
$824,532
441
$1,492
14%
Holdings [Text Block]

Asset WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Cash Equivalent
0.3%
0.4%
Board Bank Revenue
0.4%
Pollution Control
0.7%
Airports
1.1%
Mortgage-Backed Securities
1.3%
Transportation
1.3%
Power
2.1%
General Obligations
2.8%
Preferred Stock
3.4%
Health Care
3.4%
Water
3.5%
U.S. Treasury Obligations
5.6%
Nursing Homes
5.7%
Education
6.8%
Tobacco
7.0%
Industrial Development
8.2%
Housing
9.6%
General Revenue
14.3%
Corporate Obligations
21.7%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Coupon Rate
Maturity Date
Percentage of Total Net AssetsFootnote Reference(A)
United States Treasury Bill
3.632%
06/02/26
1.7%
Puerto Rico, Sub-Ser Senior
0.000%
11/01/51
1.5%
Texas State, Water Development Board, Ser A
4.875%
10/15/48
1.3%
Puerto Rico, Sales Tax Financing, Sales Tax Revenue, Ser A1
0.000%
07/01/51
1.3%
United States Treasury Bill
3.635%
05/21/26
1.2%
Take Back and Exit Facility
8.500%
10/21/27
1.1%
North Fort Bend Water Authority, Ser A
4.000%
12/15/44
1.0%
Puerto Rico, GDB Debt Recovery Authority
7.500%
08/20/40
1.0%
M-S-R, Energy Authority, Ser C
6.500%
11/01/39
0.9%
West Virginia State, Tobacco Settlement, Finance Authority, Ser B
0.000%
06/01/47
0.9%
FootnoteDescription
Footnote(A)
Cash Equivalents are not shown in the top ten chart.