Fair Value - Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2026	Sep. 30, 2026	Dec. 31, 2025
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance	$ 2,651	$ 2,850	$ 3,701
Total realized/unrealized gains or losses - Included in other comprehensive income		(189)	(46)
Transfers	10
Settlements			(805)
Ending balance	2,661	2,661	2,850
State and municipal
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance			805
Settlements			(805)
Collateralized debt obligations
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance	2,651	2,850	2,896
Total realized/unrealized gains or losses - Included in other comprehensive income		(189)	(46)
Transfers	10
Ending balance	$ 2,661	$ 2,661	$ 2,850

Fair Value - Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

12 Months Ended

Sep. 30, 2026

Dec. 31, 2025

Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs

Beginning balance

$ 2,651

$ 2,850

$ 3,701

Total realized/unrealized gains or losses - Included in other comprehensive income

(189)