Condensed Parent Company Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities:
Net income	$ 95,644	$ 81,477	$ 92,046
Decrease (increase) in other assets	13,978	(991)	(3,171)
(Decrease) increase in other liabilities	394	9,805	(391)
Net cash provided by operating activities	138,901	57,075	51,238
Investing Activities:
Net cash received (paid) in acquisition activities	(208,992)	9,559	0
Net cash used by investing activities	(1,270,443)	(960,281)	(424,686)
Financing Activities:
Repurchases of common stock	(4,036)	(31,868)	(10,000)
Stock withheld for payment of taxes	(786)	(307)	(702)
Net cash provided by financing activities	1,225,414	1,039,194	141,852
Increase (decrease) in Cash and Cash Equivalents	93,872	135,988	(231,596)
Cash and Cash Equivalents, Beginning of Year	367,290	231,302	462,898
Cash and Cash Equivalents, End of Year	461,162	367,290	231,302
Parent Company
Operating Activities:
Net income	95,644	81,477	92,046
Equity in undistributed earnings of subsidiaries	(75,697)	(20,899)	(65,555)
Decrease (increase) in other assets	3,924	5,806	(5,850)
(Decrease) increase in other liabilities	(859)	(3)	64
Net cash provided by operating activities	23,012	66,381	20,705
Investing Activities:
Net cash received (paid) in acquisition activities	(7,379)	0	0
Net cash used by investing activities	7,379	0	0
Financing Activities:
Payment of common stock cash dividends	(22,228)	(20,936)	(13,662)
Repurchases of common stock	(4,036)	(31,868)	(10,000)
Proceeds from issuance of common stock	0	0	129
Stock withheld for payment of taxes	(786)	(307)	(702)
Net cash provided by financing activities	(27,050)	(53,111)	(24,235)
Increase (decrease) in Cash and Cash Equivalents	3,341	13,270	(3,530)
Cash and Cash Equivalents, Beginning of Year	15,284	2,014	5,544
Cash and Cash Equivalents, End of Year	$ 18,625	$ 15,284	$ 2,014