Parent Company Financial Statements - Schedule of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 116,035	$ 120,224	$ 124,555
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	9,485	10,381	9,857
Net cash provided by operating activities	138,800	211,072	799,713
Investing Activities
Net cash used in investing activities	(294,004)	(55,215)	(1,754,118)
Financing Activities
Stock-based compensation withholding payments	(1,846)	(3,379)	(2,842)
Net proceeds from sale of common stock under employee stock purchase program	882	723	1,212
Repurchase of common stock	(12,699)	(4,944)	(39,979)
Dividends paid on common stock	(31,780)	(28,057)	(24,503)
Dividend equivalent payments made upon vesting of equity compensation	(166)	(226)	(168)
Net cash used in financing activities	386,760	(371,977)	183,717
Net change in cash and cash equivalents	231,556	(216,120)	(770,688)
Cash and cash equivalents at beginning of the period	810,932	1,027,052	1,797,740
Cash and cash equivalents at end of the period	1,042,488	810,932	1,027,052
Supplemental cash flow information:
Dividends declared not paid on restricted stock units and performance stock units	374	287	222
Parent Company
Operating Activities
Net income	116,035	120,224	124,555
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed income of bank subsidiary	(35,863)	(73,832)	(76,232)
Equity in undistributed income of nonbank subsidiary	0	553	(2,180)
Stock-based compensation expense	9,485	10,381	9,857
(Increase) decrease in other assets	(24,055)	1,017	(802)
Decrease in other liabilities	(8,584)	(4,064)	(7,381)
Net cash provided by operating activities	57,018	54,279	47,817
Investing Activities
Net cash used in investing activities	0	0	0
Financing Activities
Stock-based compensation withholding payments	(1,846)	(3,379)	(2,842)
Net proceeds from sale of common stock under employee stock purchase program	882	723	1,212
Repurchase of common stock	(12,699)	(4,944)	(39,979)
Dividends paid on common stock	(31,780)	(28,057)	(24,503)
Dividend equivalent payments made upon vesting of equity compensation	(166)	(226)	(168)
Net cash used in financing activities	(45,609)	(35,883)	(66,280)
Net change in cash and cash equivalents	11,409	18,396	(18,463)
Cash and cash equivalents at beginning of the period	21,448	3,052	21,515
Cash and cash equivalents at end of the period	32,857	21,448	3,052
Supplemental cash flow information:
Dividends declared not paid on restricted stock units and performance stock units	374	287	222
Noncash dividends from bank subsidiary	$ 21,700	$ 0	$ 0