Condensed Parent Company Statements - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Prepaid expenses and other assets	$ (3,257)	$ 17,163	$ 1,336
Accounts payable and accrued expenses	25,956	29,783
Net cash provided by operating activities	84,976	46,048	86,419
Net cash provided by investing activities	190,713	(131,346)	(295,149)
Proceeds from issuance of subordinated notes	0	73,513	0
Redemption of subordinated notes	(75,000)	0	0
Net cash provided by (used in) financing activities	(122,151)	428,872	226,143
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net income	74,627	59,313	73,612
Equity in undistributed earnings of subsidiary	(8,511)	(27,164)	(47,695)
Compensation expense for stock option grants	1,225	1,153	922
Amortization of interest rate derivative and deferred costs on subordinated notes	587	608	434
Loss on other investments			23
Prepaid expenses and other assets	15	(15)	(3)
Accounts payable and accrued expenses	(1,661)	31	226
Income taxes	63	(46)	300
Net cash provided by operating activities	66,345	33,880	27,819
Return of principal - other investments			2
Net cash provided by investing activities			2
Purchases of the Company's common stock	(39,123)	(22,104)	(849)
Proceeds from issuance of subordinated notes		73,513
Redemption of subordinated notes	(75,000)
Dividends paid	(18,800)	(33,426)	(29,052)
Stock options exercised	3,700	661	4,158
Net cash provided by (used in) financing activities	(129,223)	18,644	(25,743)
Increase (Decrease) in Cash	(62,878)	52,524	2,078
Cash, Beginning of Year	111,250	58,726	56,648
Cash, End of Year	48,372	111,250	58,726
Interest paid	$ 9,103	$ 7,349	$ 5,424