Securities and Other Investments - Gross Unrealized Losses and the Related Fair Value of Investment Securities (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 187,169	$ 497,072
Less than 12 months, unrealized losses	6,595	35,593
12 months or more, fair value	754,036	378,520
12 months or more, unrealized losses	77,786	43,269
Total, fair value	941,205	875,592
Total, unrealized losses	$ 84,381	$ 78,862
Total, number of securities | security	1,165	1,296
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		$ 85,699
Less than 12 months, unrealized losses		9,623
12 months or more, fair value		526,583
12 months or more, unrealized losses		46,199
Total, fair value		612,282
Total, unrealized losses		$ 55,822
Total, number of securities | security		170
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 456	$ 448
Less than 12 months, unrealized losses	8	14
12 months or more, fair value	185,640	183,382
12 months or more, unrealized losses	6,050	8,272
Total, fair value	186,096	183,830
Total, unrealized losses	$ 6,058	$ 8,286
Total, number of securities | security	9	9
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		$ 0
Less than 12 months, unrealized losses		0
12 months or more, fair value		461,926
12 months or more, unrealized losses		35,722
Total, fair value		461,926
Total, unrealized losses		$ 35,722
Total, number of securities | security		6
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 2,718	$ 2,083
Less than 12 months, unrealized losses	20	32
12 months or more, fair value	107	17
12 months or more, unrealized losses	5	1
Total, fair value	2,825	2,100
Total, unrealized losses	$ 25	$ 33
Total, number of securities | security	9	9
State, county and municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 79,617	$ 277,546
Less than 12 months, unrealized losses	1,826	18,041
12 months or more, fair value	247,397	86,569
12 months or more, unrealized losses	30,061	17,627
Total, fair value	327,014	364,115
Total, unrealized losses	$ 31,887	$ 35,668
Total, number of securities | security	608	812
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		$ 17,591
Less than 12 months, unrealized losses		1,594
12 months or more, fair value		11,654
12 months or more, unrealized losses		1,755
Total, fair value		29,245
Total, unrealized losses		$ 3,349
Total, number of securities | security		58
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 35,724	$ 102,108
Less than 12 months, unrealized losses	2,158	11,320
12 months or more, fair value	275,897	95,614
12 months or more, unrealized losses	36,933	15,408
Total, fair value	311,621	197,722
Total, unrealized losses	$ 39,091	$ 26,728
Total, number of securities | security	464	376
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		$ 68,108
Less than 12 months, unrealized losses		8,029
12 months or more, fair value		53,003
12 months or more, unrealized losses		8,722
Total, fair value		121,111
Total, unrealized losses		$ 16,751
Total, number of securities | security		106
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 68,654	$ 114,887
Less than 12 months, unrealized losses	2,583	6,186
12 months or more, fair value	44,995	12,938
12 months or more, unrealized losses	4,737	1,961
Total, fair value	113,649	127,825
Total, unrealized losses	$ 7,320	$ 8,147
Total, number of securities | security	75	90