v3.25.3
Derivatives and Hedging Activities (Derivatives in Statement of Condition) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 58,335,805 $ 50,335,091
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement 105,497 67,399
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement 183,961 372,075
Derivative Asset, Subject to Master Netting Arrangement, Gross Liability and Collateral, Obligation to Return Cash, Offset [1],[2] 195,599 286,230
Derivative Liability, Subject to Master Netting Arrangement, Gross Asset and Collateral, Right to Reclaim Cash, Offset [2] (170,574) (363,409) [1]
Derivative assets 301,096 353,629
Derivative liabilities 13,387 8,666
Cash Collateral posted 401,000 658,400
Cash Collateral received 34,900 8,800
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 51,360,248 45,422,034
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement 97,806 58,925
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement 174,329 357,182
Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 6,975,557 4,913,057
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement 7,691 8,474
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement 9,632 14,893
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 4,225,513 2,667,496
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement 6,204 4,230
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement 9,319 14,656
Not Designated as Hedging Instrument [Member] | Interest Rate Caps or Floors [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 2,725,000 2,225,000
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement 1,486 4,237
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement 0 0
Mortgage Receivable [Member] | Not Designated as Hedging Instrument [Member] | Forward Contracts [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 25,044 20,561
Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement 1 7
Derivative Liability, Gross Liability Including Not Subject to Master Netting Arrangement $ 313 $ 237
[1] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral and related accrued interest held or placed by the Bank with the same clearing agent and/or counterparties.
[2] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions and also cash collateral and related accrued interest held or placed by the Bank with the same clearing agent and/or counterparties. Cash collateral posted including accrued interest was $401.0 million for September 30, 2025 and $658.4 million for December 31, 2024. Cash collateral received was $34.9 million for September 30, 2025 and $8.8 million for December 31, 2024