Parent Company Only Condensed Financial Statements - Consolidated Statements of Cash Flow (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income available to common shareholders		$ 199,002	$ 133,055	$ 74,384
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation		8,006	6,017	4,178
Net cash provided by operating activities		216,640	160,575	135,514
Cash flows from investing activities:
Net cash paid for acquisitions and dispositions		0	212,642	62,114
Net cash used in investing activities		(1,383,784)	(23,114)	(702,829)
Cash flows from financing activities:
Proceeds from the issuance of subordinated notes		0	0	61,953
Repayments of Subordinated Debt		0	50,000	0
Repayments of Notes Payable		5,714	7,143	4,286
Dividends paid on common stock		(33,602)	(26,153)	(19,795)
Payments for Repurchase of Common Stock		32,923	60,589	15,347
Proceeds from issuance of preferred stock, net	$ 72,000	0	71,988	0
Dividends paid on preferred stock		(4,041)	0	0
Net cash provided by financing activities		$ (563,186)	$ 1,346,525	$ 937,762
Noncash investing and financing transactions:
Shares issued in connection with acquisition (in shares)		0	343,650	167,035
Parent [Member]
Cash flows from operating activities:
Net income available to common shareholders		$ 203,043	$ 133,055	$ 74,384
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation		8,006	6,017	4,178
Net income of subsidiaries		(216,777)	(148,188)	(87,989)
Dividends from subsidiaries		76,700	97,000	38,400
Other, net		6,102	(16)	3,588
Net cash provided by operating activities		77,074	87,868	32,561
Cash flows from investing activities:
Net cash paid for acquisitions and dispositions		0	2,346	(1,243)
Purchases of other investments		(2,187)	(2,204)	(1,166)
Proceeds from distributions on other investments		3,878	2,656	765
Net cash used in investing activities		1,691	2,798	(1,644)
Cash flows from financing activities:
Proceeds from the issuance of subordinated notes		0	0	61,953
Repayments of Subordinated Debt		0	(50,000)	0
Dividends paid on common stock		(33,602)	(26,153)	(19,795)
Payments for Repurchase of Common Stock		32,923	60,589	15,347
Proceeds from issuance of preferred stock, net		0	71,988	0
Dividends paid on preferred stock		(4,041)	0	0
Payments for the repurchase of equity instruments, net		1,773	516	78
Net cash provided by financing activities		(74,507)	(71,381)	22,603
Net increase in cash and cash equivalents		4,258	19,285	53,520
Cash and cash equivalents, beginning of period		94,760	75,475	21,955
Cash and cash equivalents, end of period	$ 94,760	$ 99,018	$ 94,760	$ 75,475
Noncash investing and financing transactions:
Shares issued in connection with acquisition (in shares)		0	343,650	167,035
Payments for the redemption of subordinated notes		$ (5,714)	$ (7,143)	$ (4,286)