Investment Securities - Schedule of Investment Securities in a Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Fair Value
Less than 12 Months	$ 1,423,379	$ 636,389
12 Months or Longer	487,129	8,829
Total	1,910,508	645,218
Gross Unrealized Losses
Less than 12 Months	172,828	13,239
12 Months or Longer	124,297	401
Total	$ 297,125	$ 13,640
Number of Securities | security	1,154	161
U.S. Treasury
Fair Value
Less than 12 Months	$ 2,459	$ 999
12 Months or Longer	0	0
Total	2,459	999
Gross Unrealized Losses
Less than 12 Months	42	1
12 Months or Longer	0	0
Total	$ 42	$ 1
Number of Securities | security	5	1
U.S. Government-sponsored agency securities
Fair Value
Less than 12 Months	$ 48,940	$ 68,524
12 Months or Longer	53,022	0
Total	101,962	68,524
Gross Unrealized Losses
Less than 12 Months	4,973	1,545
12 Months or Longer	12,219	0
Total	$ 17,192	$ 1,545
Number of Securities | security	16	8
State and municipal
Fair Value
Less than 12 Months	$ 1,177,104	$ 138,187
12 Months or Longer	108,652	505
Total	1,285,756	138,692
Gross Unrealized Losses
Less than 12 Months	150,096	894
12 Months or Longer	28,630	4
Total	$ 178,726	$ 898
Number of Securities | security	946	103
U.S. Government-sponsored mortgage-backed securities
Fair Value
Less than 12 Months	$ 182,700	$ 427,687
12 Months or Longer	325,455	8,324
Total	508,155	436,011
Gross Unrealized Losses
Less than 12 Months	16,910	10,791
12 Months or Longer	83,448	397
Total	$ 100,358	$ 11,188
Number of Securities | security	177	48
Corporate obligations
Fair Value
Less than 12 Months	$ 12,176	$ 992
12 Months or Longer	0	0
Total	12,176	992
Gross Unrealized Losses
Less than 12 Months	807	8
12 Months or Longer	0	0
Total	$ 807	$ 8
Number of Securities | security	10	1