Derivatives (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Counterparty default losses on forward contracts	$ 0	$ 0
Credit Derivatives [Line Items]
Commitments
Collateral required to be posted under agreements	85,600		88,300
Variation Margin Adjustment	200,300		166,300
Interest rate futures
Credit Derivatives [Line Items]
Derivative, notional amount	156,000		150,000
Mortgage-Backed Security
Credit Derivatives [Line Items]
Derivative, notional amount	17,000		36,000
Interest rate swaps
Credit Derivatives [Line Items]
Derivative, notional amount			4,700,000
Derivative Asset, Notional Amount	4,500,000
Derivative Liability, Notional Amount	4,700,000
Commitments To Originate Loans Held For Sale
Credit Derivatives [Line Items]
Commitments	40,745		20,600
Interest rate forward sales commitments
Credit Derivatives [Line Items]
Commitments	$ 68,244		$ 39,500