Securities, Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale [Abstract]
Amortized cost	$ 1,205,289	$ 1,301,244
Gross unrealized gains	524	245
Gross unrealized losses	(107,737)	(137,765)
Fair value	1,098,076	1,163,724
U.S. Treasury and Government Agencies [Member]
Available-for-sale [Abstract]
Amortized cost	361,391	381,268
Gross unrealized gains	106	121
Gross unrealized losses	(17,297)	(26,572)
Fair value	344,200	354,817
State and Political Subdivisions [Member]
Available-for-sale [Abstract]
Amortized cost	306,163	313,147
Gross unrealized gains	124	88
Gross unrealized losses	(40,416)	(48,290)
Fair value	265,871	264,945
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	488,382	518,836
Gross unrealized gains	283	36
Gross unrealized losses	(49,916)	(62,136)
Fair value	438,749	456,736
Asset-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	49,353	87,993
Gross unrealized gains	11	0
Gross unrealized losses	(108)	(767)
Fair value	$ 49,256	$ 87,226