Derivatives and Hedging Activities Derivatives in Statement of Condition (Details) - USD ($) $ in Thousands		Jun. 30, 2024		Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		$ 61,103,074		$ 78,494,986
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		95,982		154,978
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		39,281		57,773
Derivative Asset, Netting Adjustments And Cash Collateral	[2]	(30,575)	[1]	(52,987)	[3]
Derivative Liability, Netting Adjustments And Cash Collateral	[2]	(38,820)	[1]	(47,942)	[3]
Derivative assets		65,407		101,991
Derivative liabilities		461		9,831
Derivative, Collateral, Cash Posted And Related Accrued Interest		36,441		98,438
Derivative, Collateral, Cash Received And Related Accrued Interest		28,196		103,483
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		43,282,912		41,383,192
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		35,608		9,352
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		19,535		34,302
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		17,580,361		36,585,870
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		58,689		141,676
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		19,657		23,465
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Swaption [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		200,000		425,000
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		1,669		2,748
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		0		0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		17,820,162		37,111,794
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		60,374		145,626
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		19,746		23,471
Not Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Mortgage Receivable [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		39,801		100,924
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		16		1,202
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		$ 89		$ 6

[1] Amounts represent the application of the netting requirements that allow the FHLB to settle positive and negative positions and also cash collateral and related accrued interest held or placed by the FHLB with the same counterparty.

[2] Amounts represent the application of the netting requirements that allow the FHLB to settle positive and negative positions, and also cash collateral, including accrued interest, held or placed by the FHLB with the same clearing agent and/or counterparty. Cash collateral posted, including accrued interest, was (in thousands) $36,441 and $98,438 at June 30, 2024 and December 31, 2023, respectively. Cash collateral received, including accrued interest, was (in thousands) $28,196 and $103,483 at June 30, 2024 and December 31, 2023, respectively.

[3] Amounts represent the application of the netting requirements that allow the FHLB to settle positive and negative positions and also cash collateral and related accrued interest held or placed by the FHLB with the same counterparty.