Securities, HTM Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($) Position	Jun. 30, 2023 USD ($) Position	Dec. 31, 2022 USD ($) Position
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 159,428	$ 159,428	$ 393,788
12 months or longer	559,229	559,229	349,496
Total	718,657	718,657	743,284
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(6,698)	(6,698)	(27,889)
12 months or longer	(97,672)	(97,672)	(79,190)
Total	$ (104,370)	$ (104,370)	$ (107,079)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	106	106	217
12 months or longer | Position	206	206	101
Total | Position	312	312	318
HTM debt securities, nonaccrual	$ 0	$ 0	$ 0
Accrued interest reversed against interest income	0	0	0
Collateral-dependent HTM debt securities	0	0	0
AIR on HTM debt securities	$ 3,800	$ 3,800	$ 3,800
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets	Other Assets
Past Due [Member]
Unrealized Loss Position, Number of Positions [Abstract]
HTM debt securities	$ 0	$ 0	$ 0
Federal Agency [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	0	0	0
12 months or longer	80,380	80,380	79,322
Total	80,380	80,380	79,322
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	0	0
12 months or longer	(19,620)	(19,620)	(20,678)
Total	$ (19,620)	$ (19,620)	$ (20,678)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	0	0	0
12 months or longer | Position	4	4	4
Total | Position	4	4	4
Mortgage-Backed [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 27,586	$ 27,586	$ 91,417
12 months or longer	192,339	192,339	138,936
Total	219,925	219,925	230,353
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(1,519)	(1,519)	(9,096)
12 months or longer	(34,949)	(34,949)	(28,342)
Total	$ (36,468)	$ (36,468)	$ (37,438)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	7	7	21
12 months or longer | Position	27	27	13
Total | Position	34	34	34
Collateralized Mortgage Obligations [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 70,172	$ 70,172	$ 191,644
12 months or longer	156,957	156,957	48,289
Total	227,129	227,129	239,933
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(3,894)	(3,894)	(13,863)
12 months or longer	(22,688)	(22,688)	(10,855)
Total	$ (26,582)	$ (26,582)	$ (24,718)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	13	13	47
12 months or longer | Position	41	41	8
Total | Position	54	54	55
State & Municipal [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 61,670	$ 61,670	$ 110,727
12 months or longer	129,553	129,553	82,949
Total	191,223	191,223	193,676
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(1,285)	(1,285)	(4,930)
12 months or longer	(20,415)	(20,415)	(19,315)
Total	$ (21,700)	$ (21,700)	$ (24,245)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	86	86	149
12 months or longer | Position	134	134	76
Total | Position	220	220	225
US Government Agencies Debt Securities and US Government-sponsored Enterprises Debt Securities [Member]
Unrealized Loss Position, Number of Positions [Abstract]
Held-to-maturity debt securities, percentage		68.00%	70.00%