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Securities (Details 3) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	$ 58,060	$ 49,846
Unrealized Losses, Less Than 12 Months	(3,331)	(3,025)
Fair Value, 12 Months or Longer	1,091,841	1,116,642
Unrealized Losses, 12 Months or Longer	(191,681)	(219,539)
Fair Value, Total	1,149,901	1,166,488
Unrealized Losses, Total	(195,012)	(222,564)
U.S. Treasury and U.S. government sponsored entities
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	2,758	399
Unrealized Losses, Less Than 12 Months	(252)	(1)
Fair Value, 12 Months or Longer	114,823	122,361
Unrealized Losses, 12 Months or Longer	(12,752)	(17,596)
Fair Value, Total	117,581	122,760
Unrealized Losses, Total	(13,004)	(17,597)
State and political subdivisions
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	32,039	15,852
Unrealized Losses, Less Than 12 Months	(2,730)	(1,684)
Fair Value, 12 Months or Longer	418,686	428,416
Unrealized Losses, 12 Months or Longer	(84,708)	(91,819)
Fair Value, Total	450,725	444,268
Unrealized Losses, Total	(87,438)	(93,503)
Corporate bonds
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	2,392	8,463
Unrealized Losses, Less Than 12 Months	(34)	(284)
Fair Value, 12 Months or Longer	8,857	3,881
Unrealized Losses, 12 Months or Longer	(337)	(182)
Fair Value, Total	11,249	12,344
Unrealized Losses, Total	(371)	(466)
Mortgage-backed securities - residential
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	0	5,113
Unrealized Losses, Less Than 12 Months	0	(76)
Fair Value, 12 Months or Longer	497,592	515,259
Unrealized Losses, 12 Months or Longer	(88,517)	(104,068)
Fair Value, Total	497,592	520,372
Unrealized Losses, Total	(88,517)	(104,144)
Collateralized mortgage obligations
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	20,871	20,019
Unrealized Losses, Less Than 12 Months	(315)	(980)
Fair Value, 12 Months or Longer	49,258	43,808
Unrealized Losses, 12 Months or Longer	(5,170)	(5,579)
Fair Value, Total	70,129	63,827
Unrealized Losses, Total	(5,485)	(6,559)
Small Business Administration
Investment securities with unrealized losses
Fair Value, Less Than 12 Months	0	0
Unrealized Losses, Less Than 12 Months	0	0
Fair Value, 12 Months or Longer	2,625	2,917
Unrealized Losses, 12 Months or Longer	(197)	(295)
Fair Value, Total	2,625	2,917
Unrealized Losses, Total	$ (197)	$ (295)

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