Schedule of Assets (Held at End of Year) - Schedule of Assets (Held at End of Year) (Details) - The Bank of Greene County Employees’ Savings and Profit Sharing Plan and Trust [Member] - USD ($)
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12 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2024 |
| Schedule of Assets (Held at End of Year) [Abstract] |
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| Notes receivable from participants |
[1] |
$ 282,996
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| Total Investments |
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$ 25,014,980
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| Notes Receivable from Participants [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Party-in-interest |
[1] |
true
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| Investment, Identifier [Axis]: American Funds Europacific GR R6 [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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American Funds Europacific GR R6 [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 334,978
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| Investment, Identifier [Axis]: Dodge & Cox Income [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Dodge & Cox Income [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 282,345
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| Investment, Identifier [Axis]: Federated Government Obligation Fund [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Federated Government Obligation Fund [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Money Market Account [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 173,229
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| Investment, Identifier [Axis]: Greene County Bancorp, Inc. Common Stock [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Party-in-interest |
[1] |
true
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| Identity of issuer, borrower, lessor, or similar party |
[1] |
Greene County Bancorp, Inc. Common Stock [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
[1] |
Common Stock Fund- Employer Stock [Member]
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| Participant-directed status |
[1],[2] |
Participant-Directed Investments [Member]
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| Current value |
[1] |
$ 3,989,396
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| Investment, Identifier [Axis]: Invesco Global Fund R6 [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Invesco Global Fund R6 [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 837,191
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| Investment, Identifier [Axis]: LSV Value Equity [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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LSV Value Equity [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 519,286
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| Investment, Identifier [Axis]: MFS Massachusetts Investors TR R6 [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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MFS Massachusetts Investors TR R6 [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 658,269
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| Investment, Identifier [Axis]: Reliance Trust Company Stable Value Collective Trust - Series 25053 [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Reliance Trust Company Stable Value Collective Trust - Series 25053 [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Common Collective Trust Fund [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 503,973
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| Investment, Identifier [Axis]: Self-Directed Brokerage Accounts [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Self-Directed Brokerage Accounts [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 3,157,141
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| Investment, Identifier [Axis]: T. Rowe Price Blue Chip Growth [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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T. Rowe Price Blue Chip Growth [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 2,642,607
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| Investment, Identifier [Axis]: Vanguard 500 Index Admiral [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard 500 Index Admiral [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 750,164
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| Investment, Identifier [Axis]: Vanguard Inflation-Protected Secs Adm [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Inflation-Protected Secs Adm [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 135,684
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| Investment, Identifier [Axis]: Vanguard Mid Cap Index Adm [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Mid Cap Index Adm [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 1,173,384
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| Investment, Identifier [Axis]: Vanguard Small Cap Index Adm [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Small Cap Index Adm [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 1,153,092
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2020 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2020 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 123,659
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2025 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2025 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 716,190
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2030 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2030 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 1,735,172
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2035 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2035 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 960,676
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2040 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2040 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 1,731,603
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2045 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2045 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 700,439
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2050 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2050 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 446,524
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2055 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2055 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
|
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| Current value |
|
$ 879,535
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2060 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2060 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
|
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
|
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| Current value |
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$ 607,076
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2065 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2065 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
|
$ 233,812
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| Investment, Identifier [Axis]: Vanguard Target Retirement 2070 Inv. [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement 2070 Inv. [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
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Mutual Funds [Member]
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
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$ 25,558
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| Investment, Identifier [Axis]: Vanguard Target Retirement Income Inv [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Target Retirement Income Inv [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
|
Mutual Funds [Member]
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
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| Current value |
|
$ 64,498
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| Investment, Identifier [Axis]: Vanguard Value Index Adm [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Identity of issuer, borrower, lessor, or similar party |
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Vanguard Value Index Adm [Member]
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| Description of investment including maturity date, rate of interest, collateral, par, or maturity value |
|
Mutual Funds [Member]
|
|
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| Participant-directed status |
[2] |
Participant-Directed Investments [Member]
|
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| Current value |
|
$ 196,503
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| Minimum [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Notes receivable from participants, interest rate |
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4.25%
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[1] |
4.25%
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| Maximum [Member] |
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| Schedule of Assets (Held at End of Year) [Abstract] |
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| Notes receivable from participants, interest rate |
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9.50%
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[1] |
9.50%
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