This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

(expenses that you pay each year as a percentage of the value of your investment)	Class F Shares
Management Fees		0.10	%
Distribution (12b-1) Fees		None
Other Expenses		0.52	%
Total Annual Fund Operating Expenses		0.62	%

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Ultra Short Duration Bond Fund — Class F Shares				$	63			$	199			$	346			$	774

Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 78% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Operating Expenses Caption [Optional Text]

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

EXAMPLE

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

PORTFOLIO TURNOVER

Portfolio Turnover, Rate

43.00%

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Class F Shares
Management Fees		0.10	%
Distribution (12b-1) Fees		None
Other Expenses		0.66	%
Total Annual Fund Operating Expenses		0.76	%

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
GNMA Fund — Class F Shares				$	78			$	243			$	422			$	942

Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 28% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Operating Expenses Caption [Optional Text]

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

EXAMPLE

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

PORTFOLIO TURNOVER

Portfolio Turnover, Rate

78.00%

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Class Y Shares
Management Fees		0.10	%
Distribution (12b-1) Fees		None
Other Expenses		0.23	%
Total Annual Fund Operating Expenses		0.33	%

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Short-Duration Government Fund — Class Y Shares				$	34			$	106			$	185			$	418

Portfolio Turnover [Text Block]

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 43% of the average value of its portfolio.

Expense Heading [Optional Text]

Fees and Expenses

Operating Expenses Caption [Optional Text]

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

EXAMPLE

Expense Example by, Year, Caption [Text]

Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover [Heading]

PORTFOLIO TURNOVER

Portfolio Turnover, Rate

28.00%

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Class F Shares
Management Fees		0.07	%
Distribution (12b-1) Fees		None
Other Expenses		0.41	%
Total Annual Fund Operating Expenses		0.48	%
Fee Waivers and Expense Reimbursements		-0.28	%
Total Annual Fund Operating Expenses Less Fee Waivers and Expense Reimbursements		0.20	%*

* Effective May 31, 2026, the Fund's administrator and its affiliates have contractually agreed to waive fees and reimburse expenses for a period of one year in order to keep total annual Fund operating expenses (exclusive of interest from borrowings, brokerage commissions, trustees' fees, taxes and other extraordinary expenses not incurred in the ordinary course of the Fund's business) from exceeding 0.20%. This fee waiver and reimbursement agreement shall remain in effect until May 31, 2027 and, unless earlier terminated, shall be automatically renewed for successive one-year periods thereafter. The agreement may be amended or terminated only with the consent of the Board of Trustees of the Fund (Board).

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Government II Fund — Class F Shares				$	20			$	126			$	241			$	577

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Class F Shares
Management Fees		0.07	%
Distribution (12b-1) Fees		None
Other Expenses		0.41	%
Total Annual Fund Operating Expenses		0.48	%
Fee Waivers and Expense Reimbursements		-0.28	%
Total Annual Fund Operating Expenses Less Fee Waivers and Expense Reimbursements		0.20	%*

* Effective May 31, 2026, the Fund's administrator and its affiliates have contractually agreed to waive fees and reimburse expenses for a period of one year in order to keep total annual Fund operating expenses (exclusive of interest from borrowings, brokerage commissions, trustees' fees, taxes and other extraordinary expenses not incurred in the ordinary course of the Fund's business) from exceeding 0.20%. This fee waiver and reimbursement agreement shall remain in effect until May 31, 2027 and, unless earlier terminated, shall be automatically renewed for successive one-year periods thereafter. The agreement may be amended or terminated only with the consent of the Board of Trustees of the Fund (Board).

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Treasury II Fund — Class F Shares				$	20			$	126			$	241			$	577

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Admin Class Shares
Management Fees		0.07	%
Distribution (12b-1) Fees		None
Other Expenses		0.38	%
Total Annual Fund Operating Expenses		0.45	%

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Government Fund — Admin Class Shares				$	46			$	144			$	252			$	567

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Wealth Class Shares
Management Fees		0.07	%
Distribution (12b-1) Fees		None
Other Expenses		0.38	%
Total Annual Fund Operating Expenses		0.45	%

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Government Fund — Wealth Class Shares				$	46			$	144			$	252			$	567

Prospectus [Line Items]

Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell Fund shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in this table and examples below.

Annual Fund Operating Expenses [Table]

(expenses that you pay each year as a percentage of the value of your investment)	Institutional Shares
Management Fees		0.07	%
Distribution (12b-1) Fees		None
Other Expenses		0.38	%
Total Annual Fund Operating Expenses		0.45	%

Expense Example Narrative [Text Block]

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example, With Redemption [Table]

				1 Year				3 Years				5 Years				10 Years
Government Fund — Institutional Shares				$	46			$	144			$	252			$	567