Estimated Fair Values (Level 3 Reconciliation) (Details) - Private label MBS [Member] - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Purchases, issuances, sales, and settlements:
Change in unrealized gains (losses) for the period included in other comprehensive income (loss) for assets held at September 30	$ 867	$ 3,780	$ 1,254	$ 1,505
Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	107,813	116,982	113,495	125,808
(Provision) benefit for credit losses	(245)	889	(1,738)	(1,061)
Accretion of credit losses in interest income	1,112	1,582	2,991	4,465
Net unrealized gains (losses) on AFS in OCI	7	3,780	(990)	1,505
Purchases, issuances, sales, and settlements:
Settlements	(3,520)	(3,878)	(8,591)	(11,362)
Balance, end of period	105,167	119,355	105,167	119,355
Total amount of gains for the periods presented included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at September 30	$ 7	$ 2,471	$ (991)	$ 3,404

Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

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