Parent Company Only Financial Statements - Condensed - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities:
Net income	$ 133,081	$ 153,313	$ 74,854
Adjustments to reconcile net income to net cash provided by operating activities:
Net cash provided by operating activities	175,431	205,458	140,435
Investing activities:
Net cash used in investing activities	(917,423)	(232,970)	(560,575)
Financing activities:
Cash dividends paid on common stock	(101,468)	(100,274)	(93,132)
Proceeds from stock options exercised	5,173	14,011	1,479
Net cash (used)/provided by financing activities	(397,902)	570,494	1,095,571
Net (decrease)/increase in cash and cash equivalents	(1,139,894)	542,982	675,431
Cash and cash equivalents at beginning of period	1,279,259	736,277	60,846
Cash and cash equivalents at end of period	139,365	1,279,259	736,277
Parent Company
Operating activities:
Net income	133,666	154,323	74,854
Adjustments to reconcile net income to net cash provided by operating activities:
Undistributed earnings of subsidiary	18,187	(88,944)	(80,996)
Net change in other assets and liabilities	(9,457)	597	128,287
Net cash provided by operating activities	142,396	65,976	122,145
Investing activities:
Net cash used in investing activities	0	0	0
Financing activities:
Cash dividends paid on common stock	(101,468)	(100,274)	(93,132)
Purchase of common stock for retirement	0	(23,854)	(9,276)
Proceeds from stock options exercised	5,173	14,011	1,479
Net cash (used)/provided by financing activities	(96,295)	(110,117)	(100,929)
Net (decrease)/increase in cash and cash equivalents	46,101	(44,141)	21,216
Cash and cash equivalents at beginning of period	128,001	172,142	150,926
Cash and cash equivalents at end of period	$ 174,102	$ 128,001	$ 172,142