v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Advisors' Inner Circle Fund II
Entity Central Index Key 0000890540
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000015937  
Shareholder Report [Line Items]  
Fund Name Champlain Small Company Fund
Class Name Advisor Shares
Trading Symbol CIPSX
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 Advisor Shares of the Champlain Small Company Fund (the "Fund") for the period from January 1, 2026 to June 30, 2026. You can find additional information about the Fund at https://cipvt.com/documents/. You can also request this information by contacting us at 1-866-773-3238.
Additional Information Phone Number 1-866-773-3238
Additional Information Website https://cipvt.com/documents/
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
Champlain Small Company Fund, Advisor Shares
$66
1.28%
Expenses Paid, Amount $ 66
Expense Ratio, Percent 1.28%
Performance Past Does Not Indicate Future [Text] Past performance is not indicative of future performance.
No Deduction of Taxes [Text Block] The table and graph presented do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 816,194,276
Holdings Count | Holding 81
Advisory Fees Paid, Amount $ 4,593,226
InvestmentCompanyPortfolioTurnover 27.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$816,194,276
81
$4,593,226
27%
Holdings [Text Block]

Asset/Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Short-Term Investment
2.2%
Materials
2.2%
Energy
3.3%
Consumer Staples
3.7%
Consumer Discretionary
10.7%
Health Care
15.9%
Information Technology
18.5%
Financials
19.9%
Industrials
24.0%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Percentage of Total Net AssetsFootnote Reference(A)
Nutanix, Cl A
2.6%
Novanta
2.5%
Everpure, Cl A
2.4%
SPX Technologies
2.3%
Commvault Systems
2.3%
Esab
2.2%
Simpson Manufacturing
2.2%
CSW Industrials
1.9%
Glaukos
1.9%
Skyward Specialty Insurance Group
1.8%
FootnoteDescription
Footnote(A)
Short-Term Investments, if any, are not shown in the top ten holdings.
Material Fund Change [Text Block]

Material Fund Changes

There were no material changes during the reporting period.

 
Updated Prospectus Phone Number 1-866-773-3238
Updated Prospectus Web Address https://cipvt.com/documents/
C000173316  
Shareholder Report [Line Items]  
Fund Name Champlain Small Company Fund
Class Name Institutional Shares
Trading Symbol CIPNX
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 Institutional Shares of the Champlain Small Company Fund (the "Fund") for the period from January 1, 2026 to June 30, 2026. You can find additional information about the Fund at https://cipvt.com/documents/. You can also request this information by contacting us at 1-866-773-3238.
Additional Information Phone Number 1-866-773-3238
Additional Information Website https://cipvt.com/documents/
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
Champlain Small Company Fund, Institutional Shares
$53
1.03%
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.03%
Performance Past Does Not Indicate Future [Text] Past performance is not indicative of future performance.
No Deduction of Taxes [Text Block] The table and graph presented do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 816,194,276
Holdings Count | Holding 81
Advisory Fees Paid, Amount $ 4,593,226
InvestmentCompanyPortfolioTurnover 27.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$816,194,276
81
$4,593,226
27%
Holdings [Text Block]

Asset/Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Short-Term Investment
2.2%
Materials
2.2%
Energy
3.3%
Consumer Staples
3.7%
Consumer Discretionary
10.7%
Health Care
15.9%
Information Technology
18.5%
Financials
19.9%
Industrials
24.0%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Percentage of Total Net AssetsFootnote Reference(A)
Nutanix, Cl A
2.6%
Novanta
2.5%
Everpure, Cl A
2.4%
SPX Technologies
2.3%
Commvault Systems
2.3%
Esab
2.2%
Simpson Manufacturing
2.2%
CSW Industrials
1.9%
Glaukos
1.9%
Skyward Specialty Insurance Group
1.8%
FootnoteDescription
Footnote(A)
Short-Term Investments, if any, are not shown in the top ten holdings.
Material Fund Change [Text Block]

Material Fund Changes

There were no material changes during the reporting period.

 
Updated Prospectus Phone Number 1-866-773-3238
Updated Prospectus Web Address https://cipvt.com/documents/
C000065363  
Shareholder Report [Line Items]  
Fund Name Champlain Mid Cap Fund
Class Name Advisor Shares
Trading Symbol CIPMX
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 Advisor Shares of the Champlain Mid Cap Fund (the "Fund") for the period from January 1, 2026 to June 30, 2026. You can find additional information about the Fund at https://cipvt.com/documents/. You can also request this information by contacting us at 1-866-773-3238.
Additional Information Phone Number 1-866-773-3238
Additional Information Website https://cipvt.com/documents/
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
Champlain Mid Cap Fund, Advisor Shares
$59
1.18%
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.18%
Performance Past Does Not Indicate Future [Text] Past performance is not indicative of future performance.
No Deduction of Taxes [Text Block] The table and graph presented do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 1,208,080,612
Holdings Count | Holding 72
Advisory Fees Paid, Amount $ 7,480,857
InvestmentCompanyPortfolioTurnover 25.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$1,208,080,612
72
$7,480,857
25%
Holdings [Text Block]

Asset/Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Consumer Staples
1.9%
Short-Term Investments
2.8%
Energy
5.9%
Consumer Discretionary
7.8%
Financials
16.8%
Health Care
17.3%
Information Technology
23.2%
Industrials
24.8%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Percentage of Total Net AssetsFootnote Reference(A)
Okta, Cl A
3.0%
Synopsys
2.9%
Nutanix, Cl A
2.6%
EOG Resources
2.5%
Texas Pacific Land
2.4%
Tradeweb Markets, Cl A
2.3%
Fastenal
2.3%
Veeva Systems, Cl A
2.2%
Everpure, Cl A
2.1%
IDEX
2.1%
FootnoteDescription
Footnote(A)
Short-Term Investments, if any, are not shown in the top ten holdings.
Material Fund Change [Text Block]

Material Fund Changes

There were no material changes during the reporting period.

 
Updated Prospectus Phone Number 1-866-773-3238
Updated Prospectus Web Address https://cipvt.com/documents/
C000096284  
Shareholder Report [Line Items]  
Fund Name Champlain Mid Cap Fund
Class Name Institutional Shares
Trading Symbol CIPIX
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 Institutional Shares of the Champlain Mid Cap Fund (the "Fund") for the period from January 1, 2026 to June 30, 2026. You can find additional information about the Fund at https://cipvt.com/documents/. You can also request this information by contacting us at 1-866-773-3238.
Additional Information Phone Number 1-866-773-3238
Additional Information Website https://cipvt.com/documents/
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
Champlain Mid Cap Fund, Institutional Shares
$47
0.93%
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.93%
Performance Past Does Not Indicate Future [Text] Past performance is not indicative of future performance.
No Deduction of Taxes [Text Block] The table and graph presented do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 1,208,080,612
Holdings Count | Holding 72
Advisory Fees Paid, Amount $ 7,480,857
InvestmentCompanyPortfolioTurnover 25.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$1,208,080,612
72
$7,480,857
25%
Holdings [Text Block]

Asset/Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Consumer Staples
1.9%
Short-Term Investments
2.8%
Energy
5.9%
Consumer Discretionary
7.8%
Financials
16.8%
Health Care
17.3%
Information Technology
23.2%
Industrials
24.8%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Percentage of Total Net AssetsFootnote Reference(A)
Okta, Cl A
3.0%
Synopsys
2.9%
Nutanix, Cl A
2.6%
EOG Resources
2.5%
Texas Pacific Land
2.4%
Tradeweb Markets, Cl A
2.3%
Fastenal
2.3%
Veeva Systems, Cl A
2.2%
Everpure, Cl A
2.1%
IDEX
2.1%
FootnoteDescription
Footnote(A)
Short-Term Investments, if any, are not shown in the top ten holdings.
Material Fund Change [Text Block]

Material Fund Changes

There were no material changes during the reporting period.

 
Updated Prospectus Phone Number 1-866-773-3238
Updated Prospectus Web Address https://cipvt.com/documents/
C000245657  
Shareholder Report [Line Items]  
Fund Name Champlain Strategic Focus Fund
Class Name Institutional Shares
Trading Symbol CIPTX
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 Institutional Shares of the Champlain Strategic Focus Fund (the "Fund") for the period from January 1, 2026 to June 30, 2026. You can find additional information about the Fund at https://cipvt.com/documents/. You can also request this information by contacting us at 1-866-773-3238.
Additional Information Phone Number 1-866-773-3238
Additional Information Website https://cipvt.com/documents/
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
Champlain Strategic Focus Fund, Institutional Shares
$43
0.85%
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.85%
Performance Past Does Not Indicate Future [Text] Past performance is not indicative of future performance.
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 3,743,526
Holdings Count | Holding 27
Advisory Fees Paid, Amount $ 0
InvestmentCompanyPortfolioTurnover 35.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

Table Summary
Total Net Assets
Number of Holdings
Total Advisory Fees Paid
Portfolio Turnover Rate
$3,743,526
27
$-
35%
Holdings [Text Block]

Asset/Sector WeightingsFootnote Reference*

Holdings Chart
Table Summary
Value
Value
Consumer Discretionary
2.9%
Short-Term Investment
4.9%
Energy
5.5%
Financials
8.8%
Health Care
11.5%
Information Technology
32.2%
Industrials
34.1%
FootnoteDescription
Footnote*
Percentages are calculated based on total net assets.
Largest Holdings [Text Block]

Top Ten Holdings

Table Summary
Holding Name
Percentage of Total Net AssetsFootnote Reference(A)
Axon Enterprise
6.5%
Synopsys
5.6%
Fastenal
5.5%
Veeva Systems, Cl A
5.4%
IDEX
5.2%
Okta, Cl A
4.8%
Everpure, Cl A
4.8%
AMETEK
4.1%
MongoDB, Cl A
3.8%
Nutanix, Cl A
3.6%
FootnoteDescription
Footnote(A)
Short-Term Investments, if any, are not shown in the top ten holdings.
Material Fund Change [Text Block]

Material Fund Changes

There were no material changes during the reporting period.

 
Updated Prospectus Phone Number 1-866-773-3238
Updated Prospectus Web Address https://cipvt.com/documents/