Investment Securities, Analysis of Gross Unrealized Losses (Details) $ in Thousands	Dec. 31, 2022 USD ($) Security	Dec. 31, 2021 USD ($)
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 275,604	$ 389,464
12 months or more, fair value	327,817	41,453
Total fair value	603,421	430,917
Less than 12 months, unrealized losses	(14,760)	(7,514)
12 Months or more, unrealized losses	(51,034)	(1,163)
Total unrealized losses	$ (65,794)	(8,677)
Investment securities in unrealized loss position less than 12 months | Security	400
Investment securities in unrealized loss position more than 12 months | Security	171
Investment securities	$ 44,319	39,695
U.S. Treasury Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	54,574	63,254
12 months or more, fair value	56,872	2,066
Total fair value	111,446	65,320
Less than 12 months, unrealized losses	(1,680)	(673)
12 Months or more, unrealized losses	(4,162)	(38)
Total unrealized losses	(5,842)	(711)
Securities of U.S. Government Agencies and Corporations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	45,261	48,288
12 months or more, fair value	69,635	30,158
Total fair value	114,896	78,446
Less than 12 months, unrealized losses	(1,341)	(942)
12 Months or more, unrealized losses	(8,465)	(884)
Total unrealized losses	(9,806)	(1,826)
Obligations of States and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	40,479	11,680
12 months or more, fair value	10,049	934
Total fair value	50,528	12,614
Less than 12 months, unrealized losses	(3,022)	(233)
12 Months or more, unrealized losses	(2,620)	(68)
Total unrealized losses	(5,642)	(301)
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	36,040	90,299
12 months or more, fair value	59,310	1,298
Total fair value	95,350	91,597
Less than 12 months, unrealized losses	(2,586)	(2,850)
12 Months or more, unrealized losses	(17,047)	(35)
Total unrealized losses	(19,633)	(2,885)
Mortgage-backed Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	99,250	175,943
12 months or more, fair value	131,951	6,997
Total fair value	231,201	182,940
Less than 12 months, unrealized losses	(6,131)	(2,816)
12 Months or more, unrealized losses	(18,740)	(138)
Total unrealized losses	$ (24,871)	$ (2,954)