This Semi-Annual shareholder report contains important information about SFT Balanced Stabilization Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.securianfunds.com</span>

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Balanced Stabilization Fund (Class 2)	$45	0.88%

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.88%

AssetsNet

$ 569,004,313

Holdings Count | Holding

166

Advisory Fees Paid, Amount

$ 1,565,326

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$569,004,313
# of Portfolio Holdings166
Portfolio Turnover Rate2%
Total Advisory Fees Paid$1,565,326

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Investment Companies	67.1%
Financial	10.1%
Consumer, Non-cyclical	5.7%
Utilities	3.6%
Industrials	2.5%
Communications	2.4%
Information Technology	2.1%
Energy	1.9%
Government Obligations	1.7%
Other	2.5%
Other Assets and Liabilities, Net	0.4%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
SFT Index 500 Fund	53.4%
iShares Core S&P 500 ETF	4.7%
State Street SPDR S&P 500 ETF Trust	4.3%
Vanguard S&P 500 ETF	2.7%
U.S. Treasury Bonds, 4.000%, 11/15/42	0.9%
U.S. Treasury Notes, 3.875%, 12/31/27	0.6%
M&T Bank Corp., 5.400%, 07/30/35 (5 yr. CMT + 1.430%)	0.5%
Keybank National Association, 4.390%, 12/14/27	0.5%
Intercontinental Exchange, Inc., 4.350%, 06/15/29	0.5%
Entergy Texas, Inc., 3.450%, 12/01/27	0.5%
Total	68.6%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072676

Shareholder Report [Line Items]

Fund Name

SFT Core Bond Fund

Class Name

Class 1

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Core Bond Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Core Bond Fund (Class 1)	$27	0.54%

Expenses Paid, Amount

$ 27

Expense Ratio, Percent

0.54%

AssetsNet

$ 414,191,378

Holdings Count | Holding

687

Advisory Fees Paid, Amount

$ 832,700

InvestmentCompanyPortfolioTurnover

167.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$414,191,378
# of Portfolio Holdings687
Portfolio Turnover Rate167%
Total Advisory Fees Paid$832,700

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
U.S. Treasury	33.1%
Corporate Obligations	14.5%
Uniform Mortgage-Backed Security	12.0%
Asset-Backed Securities	11.9%
Other Mortgage-Backed Securities	10.3%
Federal National Mortgage Association	9.3%
Federal Home Loan Mortgage Corporation	9.0%
Investment Companies	7.6%
Government National Mortgage Association	6.0%
Other	3.2%
Other Assets and Liabilities, Net	(16.9%)
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
U.S. Treasury Notes, 4.125%, 05/31/31	10.5%
U.S. Treasury Bonds, 5.000%, 05/15/56	4.5%
U.S. Treasury Notes, 4.000%, 05/31/28	3.8%
Uniform Mortgage-Backed Security, TBA, 3.500%, 07/13/56	3.4%
Uniform Mortgage-Backed Security, TBA, 4.000%, 07/13/56	3.2%
U.S. Treasury Bonds, 5.000%, 05/15/46	2.6%
U.S. Treasury Notes, 4.125%, 06/30/31	2.5%
U.S. Treasury Notes, 4.375%, 05/15/36	2.4%
U.S. Treasury Notes, 4.125%, 06/30/28	2.1%
U.S. Treasury Notes, 4.125%, 06/15/29	2.1%
Total	37.1%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072677

Shareholder Report [Line Items]

Fund Name

SFT Core Bond Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Core Bond Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Core Bond Fund (Class 2)	$39	0.79%

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.79%

AssetsNet

$ 414,191,378

Holdings Count | Holding

687

Advisory Fees Paid, Amount

$ 832,700

InvestmentCompanyPortfolioTurnover

167.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$414,191,378
# of Portfolio Holdings687
Portfolio Turnover Rate167%
Total Advisory Fees Paid$832,700

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
U.S. Treasury	33.1%
Corporate Obligations	14.5%
Uniform Mortgage-Backed Security	12.0%
Asset-Backed Securities	11.9%
Other Mortgage-Backed Securities	10.3%
Federal National Mortgage Association	9.3%
Federal Home Loan Mortgage Corporation	9.0%
Investment Companies	7.6%
Government National Mortgage Association	6.0%
Other	3.2%
Other Assets and Liabilities, Net	(16.9%)
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
U.S. Treasury Notes, 4.125%, 05/31/31	10.5%
U.S. Treasury Bonds, 5.000%, 05/15/56	4.5%
U.S. Treasury Notes, 4.000%, 05/31/28	3.8%
Uniform Mortgage-Backed Security, TBA, 3.500%, 07/13/56	3.4%
Uniform Mortgage-Backed Security, TBA, 4.000%, 07/13/56	3.2%
U.S. Treasury Bonds, 5.000%, 05/15/46	2.6%
U.S. Treasury Notes, 4.125%, 06/30/31	2.5%
U.S. Treasury Notes, 4.375%, 05/15/36	2.4%
U.S. Treasury Notes, 4.125%, 06/30/28	2.1%
U.S. Treasury Notes, 4.125%, 06/15/29	2.1%
Total	37.1%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000162345

Shareholder Report [Line Items]

Fund Name

SFT Equity Stabilization Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Equity Stabilization Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Equity Stabilization Fund (Class 2)	$47	0.93%

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.93%

AssetsNet

$ 240,558,460

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 673,617

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$240,558,460
# of Portfolio Holdings7
Portfolio Turnover Rate0%
Total Advisory Fees Paid$673,617

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Investment Companies	99.3%
Other Assets and Liabilities, Net	0.7%
Total	100.0%

Largest Holdings [Text Block]

Top Largest Holdings (% of Net Assets)

Table Summary
iShares MSCI USA Minimum Volatility Factor ETF	33.6%
iShares MSCI EAFE Minimum Volatility Factor ETF	24.5%
iShares Core High Dividend ETF	18.8%
iShares MSCI Emerging Markets Minimum Volatility Factor ETF	6.7%
iShares Short Duration Bond Active ETF	6.0%
iShares MSCI Germany ETF	4.5%
Total	94.1%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000004536

Shareholder Report [Line Items]

Fund Name

SFT Government Money Market Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Government Money Market Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Government Money Market Fund (Class 2)	$32	0.65%

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.65%

AssetsNet

$ 226,239,205

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 283,094

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$226,239,205
# of Portfolio Holdings17
Total Advisory Fees Paid$283,094

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
U.S. Government Obligations	90.6%
Short-Term Securities	9.9%
Other Assets and Liabilities, Net	(0.5%)
Total	100.0%

Largest Holdings [Text Block]

Top Largest Holdings (% of Net Assets)

Table Summary
Federal Home Loan Bank Discount Notes, 3.662%, due 07/31/26	11.0%
U.S. Treasury Bills, 3.692%, due 08/18/26	11.0%
U.S. Treasury Bills, 3.162%, due 07/07/26	8.8%
Federal Home Loan Bank Discount Notes, 3.714%, due 08/14/26	8.8%
Federal Home Loan Mortgage Corp. Discount Notes, 3.545%, due 07/20/26	8.4%
Federal Home Loan Bank Discount Notes, 3.133%, due 07/06/26	6.6%
Federal Home Loan Bank Discount Notes, 3.737%, due 08/21/26	6.6%
Federal Home Loan Bank Discount Notes, 3.532%, due 07/17/26	5.5%
U.S. Treasury Bills, 3.623%, due 08/04/26	4.4%
Federal Home Loan Bank Discount Notes, 3.592%, due 07/29/26	4.1%
Total	75.2%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072678

Shareholder Report [Line Items]

Fund Name

SFT Index 400 Mid-Cap Fund

Class Name

Class 1

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Index 400 Mid-Cap Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Index 400 Mid-Cap Fund (Class 1)	$16	0.29%

Expenses Paid, Amount

$ 16

Expense Ratio, Percent

0.29%

AssetsNet

$ 272,754,699

Holdings Count | Holding

403

Advisory Fees Paid, Amount

$ 189,652

InvestmentCompanyPortfolioTurnover

11.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$272,754,699
# of Portfolio Holdings403
Portfolio Turnover Rate11%
Total Advisory Fees Paid$189,652

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Industrials	25.8%
Information Technology	15.2%
Financial	14.4%
Consumer Discretionary	10.2%
Health Care	8.5%
Real Estate	6.5%
Materials	5.6%
Energy	4.3%
Consumer Staples	3.1%
Other	6.4%
Other Assets and Liabilities, Net	-%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
Twilio, Inc., Class A	0.8%
Carpenter Technology Corp.	0.8%
MKS, Inc.	0.8%
Curtiss-Wright Corp.	0.8%
nVent Electric PLC	0.7%
Entegris, Inc.	0.7%
ATI, Inc.	0.7%
Illumina, Inc.	0.7%
TechnipFMC PLC	0.7%
Sterling Infrastructure, Inc.	0.7%
Total	7.4%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072679

Shareholder Report [Line Items]

Fund Name

SFT Index 400 Mid-Cap Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Index 400 Mid-Cap Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Index 400 Mid-Cap Fund (Class 2)	$29	0.54%

Expenses Paid, Amount

$ 29

Expense Ratio, Percent

0.54%

AssetsNet

$ 272,754,699

Holdings Count | Holding

403

Advisory Fees Paid, Amount

$ 189,652

InvestmentCompanyPortfolioTurnover

11.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$272,754,699
# of Portfolio Holdings403
Portfolio Turnover Rate11%
Total Advisory Fees Paid$189,652

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Industrials	25.8%
Information Technology	15.2%
Financial	14.4%
Consumer Discretionary	10.2%
Health Care	8.5%
Real Estate	6.5%
Materials	5.6%
Energy	4.3%
Consumer Staples	3.1%
Other	6.4%
Other Assets and Liabilities, Net	-%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
Twilio, Inc., Class A	0.8%
Carpenter Technology Corp.	0.8%
MKS, Inc.	0.8%
Curtiss-Wright Corp.	0.8%
nVent Electric PLC	0.7%
Entegris, Inc.	0.7%
ATI, Inc.	0.7%
Illumina, Inc.	0.7%
TechnipFMC PLC	0.7%
Sterling Infrastructure, Inc.	0.7%
Total	7.4%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072680

Shareholder Report [Line Items]

Fund Name

SFT Index 500 Fund

Class Name

Class 1

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Index 500 Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Index 500 Fund (Class 1)	$9	0.17%

Expenses Paid, Amount

$ 9

Expense Ratio, Percent

0.17%

AssetsNet

$ 1,729,851,312

Holdings Count | Holding

505

Advisory Fees Paid, Amount

$ 1,063,426

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$1,729,851,312
# of Portfolio Holdings505
Portfolio Turnover Rate1%
Total Advisory Fees Paid$1,063,426

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Information Technology	37.7%
Financial	11.6%
Communication Services	9.6%
Consumer Discretionary	9.2%
Health Care	8.8%
Industrials	8.8%
Consumer Staples	4.5%
Energy	3.0%
Utilities	2.2%
Other	4.6%
Other Assets and Liabilities, Net	-%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
NVIDIA Corp.	7.4%
Apple, Inc.	6.5%
Microsoft Corp.	4.3%
Amazon.com, Inc.	3.6%
Alphabet, Inc., Class A	3.2%
Broadcom, Inc.	2.7%
Alphabet, Inc., Class C	2.6%
Micron Technology, Inc.	2.0%
Meta Platforms, Inc., Class A	1.9%
Tesla, Inc.	1.8%
Total	36.0%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072681

Shareholder Report [Line Items]

Fund Name

SFT Index 500 Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Index 500 Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Index 500 Fund (Class 2)	$22	0.42%

Expenses Paid, Amount

$ 22

Expense Ratio, Percent

0.42%

AssetsNet

$ 1,729,851,312

Holdings Count | Holding

505

Advisory Fees Paid, Amount

$ 1,063,426

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$1,729,851,312
# of Portfolio Holdings505
Portfolio Turnover Rate1%
Total Advisory Fees Paid$1,063,426

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Information Technology	37.7%
Financial	11.6%
Communication Services	9.6%
Consumer Discretionary	9.2%
Health Care	8.8%
Industrials	8.8%
Consumer Staples	4.5%
Energy	3.0%
Utilities	2.2%
Other	4.6%
Other Assets and Liabilities, Net	-%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
NVIDIA Corp.	7.4%
Apple, Inc.	6.5%
Microsoft Corp.	4.3%
Amazon.com, Inc.	3.6%
Alphabet, Inc., Class A	3.2%
Broadcom, Inc.	2.7%
Alphabet, Inc., Class C	2.6%
Micron Technology, Inc.	2.0%
Meta Platforms, Inc., Class A	1.9%
Tesla, Inc.	1.8%
Total	36.0%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000140836

Shareholder Report [Line Items]

Fund Name

SFT Nomura Growth Fund (formerly SFT Macquarie Growth Fund)

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Nomura Growth Fund (formerly SFT Macquarie Growth Fund) for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Nomura Growth Fund (Class 2)	$47	0.96%

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.96%

Material Change Date

Jun. 30, 2026

AssetsNet

$ 609,115,511

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 1,917,642

InvestmentCompanyPortfolioTurnover

17.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$609,115,511
# of Portfolio Holdings36
Portfolio Turnover Rate17%
Total Advisory Fees Paid$1,917,642

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Information Technology	47.2%
Health Care	13.6%
Financial	12.8%
Communication Services	9.8%
Industrials	7.4%
Consumer Discretionary	7.1%
Materials	1.5%
Investment Companies	0.5%
Consumer Staples	0.2%
Other Assets and Liabilities, Net	(0.1%)
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
NVIDIA Corp.	15.6%
Apple, Inc.	8.6%
Microsoft Corp.	7.7%
Alphabet, Inc., Class A	7.1%
Advanced Micro Devices, Inc.	5.2%
Amazon.com, Inc.	5.1%
Visa, Inc., Class A	4.9%
Eli Lilly & Co.	4.8%
Taiwan Semiconductor Manufacturing Co. Ltd. ADR	4.0%
Broadcom, Inc.	3.2%
Total	66.2%

Material Fund Change [Text Block]

Material Fund Changes

This is a summary of certain changes to the Fund since June 30, 2026. For more information, you may review the Fund's prospectus, which is available at www.securianfunds.com or upon request at 800-643-5728.

Effective as of May 1, 2026, the SFT Macquarie Growth Fund changed its name to SFT Nomura Growth Fund.

Material Fund Change Name [Text Block]

Effective as of May 1, 2026, the SFT Macquarie Growth Fund changed its name to SFT Nomura Growth Fund.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000140837

Shareholder Report [Line Items]

Fund Name

SFT Nomura Small Cap Growth Fund (formerly SFT Macquarie Small Cap Growth Fund)

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Nomura Small Cap Growth Fund (formerly SFT Macquarie Small Cap Growth Fund) for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Material Fund Change Notice [Text Block]

This report describes changes to the Fund that occurred during the reporting period.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Nomura Small Cap Growth Fund (Class 2)	$70	1.28%

Expenses Paid, Amount

$ 70

Expense Ratio, Percent

1.28%

Material Change Date

Jun. 30, 2026

AssetsNet

$ 194,204,169

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 730,713

InvestmentCompanyPortfolioTurnover

58.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$194,204,169
# of Portfolio Holdings81
Portfolio Turnover Rate58%
Total Advisory Fees Paid$730,713

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Health Care	26.1%
Information Technology	23.7%
Industrials	18.7%
Financial	8.7%
Consumer Discretionary	7.6%
Energy	4.5%
Materials	3.8%
Consumer Staples	3.3%
Communication Services	2.2%
Other	1.5%
Other Assets and Liabilities, Net	(0.1%)
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
Mirum Pharmaceuticals, Inc.	2.3%
PriceSmart, Inc.	2.2%
DigitalOcean Holdings, Inc.	2.2%
FirstCash Holdings, Inc.	2.1%
Kontoor Brands, Inc.	2.1%
Agilysys, Inc.	2.0%
Adaptive Biotechnologies Corp.	2.0%
Advanced Energy Industries, Inc.	2.0%
Encompass Health Corp.	2.0%
A10 Networks, Inc.	1.9%
Total	20.8%

Material Fund Change [Text Block]

Material Fund Changes

Effective as of May 1, 2026, the SFT Macquarie Small Cap Growth Fund changed its name to SFT Nomura Small Cap Growth Fund.

Material Fund Change Name [Text Block]

Effective as of May 1, 2026, the SFT Macquarie Small Cap Growth Fund changed its name to SFT Nomura Small Cap Growth Fund.

Summary of Change Legend [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072687

Shareholder Report [Line Items]

Fund Name

SFT Real Estate Securities Fund

Class Name

Class 1

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Real Estate Securities Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Real Estate Securities Fund (Class 1)	$52	0.97%

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.97%

AssetsNet

$ 124,591,735

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 421,166

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$124,591,735
# of Portfolio Holdings41
Portfolio Turnover Rate15%
Total Advisory Fees Paid$421,166

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Real Estate	96.4%
Investment Companies	1.4%
Consumer Discretionary	1.3%
Health Care	0.7%
Other Assets and Liabilities, Net	0.2%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
Welltower, Inc.	13.7%
Digital Realty Trust, Inc.	9.5%
Prologis, Inc.	4.5%
American Tower Corp.	4.5%
Extra Space Storage, Inc.	4.4%
Crown Castle, Inc.	4.0%
Equinix, Inc.	3.6%
Agree Realty Corp.	3.6%
Sun Communities, Inc.	3.3%
Iron Mountain, Inc.	3.1%
Total	54.2%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000072686

Shareholder Report [Line Items]

Fund Name

SFT Real Estate Securities Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Real Estate Securities Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Real Estate Securities Fund (Class 2)	$65	1.22%

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.22%

AssetsNet

$ 124,591,735

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 421,166

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$124,591,735
# of Portfolio Holdings41
Portfolio Turnover Rate15%
Total Advisory Fees Paid$421,166

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Real Estate	96.4%
Investment Companies	1.4%
Consumer Discretionary	1.3%
Health Care	0.7%
Other Assets and Liabilities, Net	0.2%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
Welltower, Inc.	13.7%
Digital Realty Trust, Inc.	9.5%
Prologis, Inc.	4.5%
American Tower Corp.	4.5%
Extra Space Storage, Inc.	4.4%
Crown Castle, Inc.	4.0%
Equinix, Inc.	3.6%
Agree Realty Corp.	3.6%
Sun Communities, Inc.	3.3%
Iron Mountain, Inc.	3.1%
Total	54.2%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000140840

Shareholder Report [Line Items]

Fund Name

SFT T. Rowe Price Value Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT T. Rowe Price Value Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT T. Rowe Price Value Fund (Class 2)	$52	0.98%

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.98%

AssetsNet

$ 217,434,496

Holdings Count | Holding

110

Advisory Fees Paid, Amount

$ 595,734

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$217,434,496
# of Portfolio Holdings110
Portfolio Turnover Rate39%
Total Advisory Fees Paid$595,734

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Information Technology	19.3%
Financial	18.1%
Health Care	13.2%
Industrials	12.7%
Consumer Discretionary	10.2%
Energy	7.7%
Consumer Staples	4.6%
Materials	4.1%
Real Estate	3.5%
Other	6.1%
Other Assets and Liabilities, Net	0.5%
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
Amazon.com, Inc.	5.5%
Apple, Inc.	5.3%
Microsoft Corp.	3.4%
JPMorgan Chase & Co.	3.4%
Berkshire Hathaway, Inc., Class B	2.8%
Deere & Co.	2.6%
Keysight Technologies, Inc.	2.4%
Johnson & Johnson	2.2%
UnitedHealth Group, Inc.	2.0%
Westinghouse Air Brake Technologies Corp.	1.8%
Total	31.4%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000140838

Shareholder Report [Line Items]

Fund Name

SFT Wellington Core Equity Fund

Class Name

Class 1

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Wellington Core Equity Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Wellington Core Equity Fund (Class 1)	$40	0.77%

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.77%

AssetsNet

$ 141,916,304

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 373,997

InvestmentCompanyPortfolioTurnover

21.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$141,916,304
# of Portfolio Holdings74
Portfolio Turnover Rate21%
Total Advisory Fees Paid$373,997

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Information Technology	36.2%
Communication Services	11.1%
Financial	10.6%
Industrials	9.6%
Consumer Discretionary	8.2%
Health Care	7.8%
Consumer Staples	5.7%
Energy	3.1%
Utilities	2.3%
Other	5.5%
Other Assets and Liabilities, Net	(0.1%)
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
NVIDIA Corp.	8.4%
Apple, Inc.	6.8%
Alphabet, Inc., Class A	6.8%
Microsoft Corp.	5.2%
Amazon.com, Inc.	4.6%
Broadcom, Inc.	3.7%
Micron Technology, Inc.	2.5%
Eli Lilly & Co.	2.4%
Meta Platforms, Inc., Class A	2.3%
KLA Corp.	2.2%
Total	44.9%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address

C000140839

Shareholder Report [Line Items]

Fund Name

SFT Wellington Core Equity Fund

Class Name

Class 2

No Trading Symbol [Flag]

true

Annual or Semi-Annual Statement [Text Block]

This Semi-Annual shareholder report contains important information about SFT Wellington Core Equity Fund for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.securianfunds.com. You can also request this information by contacting us at 800-643-5728.

Additional Information Phone Number

800-643-5728

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the six month period?

Annual Fund Operating Expenses

(based on a hypothetical $10,000 investment)

Table Summary
Fund Name	Cost of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
SFT Wellington Core Equity Fund (Class 2)	$52	1.01%

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

1.01%

AssetsNet

$ 141,916,304

Holdings Count | Holding

Advisory Fees Paid, Amount

$ 373,997

InvestmentCompanyPortfolioTurnover

21.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets$141,916,304
# of Portfolio Holdings74
Portfolio Turnover Rate21%
Total Advisory Fees Paid$373,997

Holdings [Text Block]

Sector Diversification (% of net assets)

Table Summary
Information Technology	36.2%
Communication Services	11.1%
Financial	10.6%
Industrials	9.6%
Consumer Discretionary	8.2%
Health Care	7.8%
Consumer Staples	5.7%
Energy	3.1%
Utilities	2.3%
Other	5.5%
Other Assets and Liabilities, Net	(0.1%)
Total	100.0%

Largest Holdings [Text Block]

Ten Largest Holdings (% of Net Assets)

Table Summary
NVIDIA Corp.	8.4%
Apple, Inc.	6.8%
Alphabet, Inc., Class A	6.8%
Microsoft Corp.	5.2%
Amazon.com, Inc.	4.6%
Broadcom, Inc.	3.7%
Micron Technology, Inc.	2.5%
Eli Lilly & Co.	2.4%
Meta Platforms, Inc., Class A	2.3%
KLA Corp.	2.2%
Total	44.9%

Material Fund Change [Text Block]

Updated Prospectus Phone Number

800-643-5728

Updated Prospectus Email Address

Updated Prospectus Web Address