Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Securities [Abstract]
Amortized Cost	$ 1,178,719	$ 1,206,938
Gross unrealized gains	839	1,358
Gross unrealized losses	(91,353)	(87,577)
Fair value	1,088,205	1,120,719
U.S. Treasury and Government Agencies [Member]
Securities [Abstract]
Amortized Cost	168,047	243,840
Gross unrealized gains	58	65
Gross unrealized losses	(7,636)	(8,146)
Fair value	160,469	235,759
State and Political Subdivisions [Member]
Securities [Abstract]
Amortized Cost	302,785	303,118
Gross unrealized gains	75	117
Gross unrealized losses	(38,979)	(36,344)
Fair value	263,881	266,891
Agency Mortgage-backed Securities [Member]
Securities [Abstract]
Amortized Cost	685,399	630,172
Gross unrealized gains	682	1,119
Gross unrealized losses	(44,620)	(43,029)
Fair value	641,461	588,262
Asset-backed Securities [Member]
Securities [Abstract]
Amortized Cost	22,488	29,808
Gross unrealized gains	24	57
Gross unrealized losses	(118)	(58)
Fair value	$ 22,394	$ 29,807

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details