Financial Derivatives - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Derivative [Line Items]
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable (includes $9,885 and $12,514, respectively, related to consolidated trusts)		Accrued interest receivable (includes $9,885 and $12,514, respectively, related to consolidated trusts)
Gain expected to be reclassified from AOCI to earnings over next 12 months	$ 13,700,000
Gain (loss) from interest rate swaps designated as cash flow hedges reclassified to earnings	0	$ 0
Financial derivatives in net payable position	0		$ 0
Notional amount	25,020,668,000		23,878,611,000
Exchange Cleared
Derivative [Line Items]
Notional amount	20,300,000,000		19,500,000,000
Interest Rate Swap
Derivative [Line Items]
Notional amount	25,000,000,000		23,900,000,000
Cleared Swaps
Derivative [Line Items]
Accrued interest on cleared swaps	8,200,000		6,100,000
Uncleared Swaps
Derivative [Line Items]
Accrued interest payable	$ 4,500,000		$ 3,600,000