Securities, Available-for-sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Available-for-sale [Abstract]
Amortized cost	$ 1,102,258	$ 1,186,649
Gross unrealized gains	1,031	237
Gross unrealized losses	(108,299)	(131,158)
Fair value	994,990	1,055,728
Accrued interest receivable on available-for-sale debt securities	4,300	4,600
U.S. Treasury and Government Agencies [Member]
Available-for-sale [Abstract]
Amortized cost	259,632	360,027
Gross unrealized gains	77	84
Gross unrealized losses	(12,183)	(18,616)
Fair value	247,526	341,495
State and Political Subdivisions [Member]
Available-for-sale [Abstract]
Amortized cost	303,197	304,588
Gross unrealized gains	65	12
Gross unrealized losses	(45,517)	(51,043)
Fair value	257,745	253,557
Agency Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	490,995	471,000
Gross unrealized gains	856	131
Gross unrealized losses	(50,440)	(61,422)
Fair value	441,411	409,709
Asset-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	48,434	51,034
Gross unrealized gains	33	10
Gross unrealized losses	(159)	(77)
Fair value	$ 48,308	$ 50,967