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Parent Company Financial Information (Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements Captions Line Items
Net income	$ 48,862	$ 39,526	$ 33,526
Depreciation and amortization	8,213	6,477	6,177
Share-based compensation	1,406	1,301	1,174
Decrease (increase) in other assets	(21,263)	13,376	(24,505)
(Decrease) increase in other liabilities	14,973	3,065	4,016
Net cash provided by operating activities	57,710	65,139	46,279
Purchases of premises and equipment	(3,639)	(2,842)	(7,740)
Net cash paid for acquisition		(4,447)	(676)
Net cash used in investing activities	(24,733)	(225,409)	(372,614)
Proceeds from stock options exercised		320	413
Net cash (used in) provided by financing activities	(22,785)	163,830	354,253
Net increase in cash and cash equivalents	10,192	3,560	27,918
Cash and cash equivalents, beginning of period	102,755	99,195	71,277
Cash and cash equivalents, end of period	112,947	102,755	99,195
Parent Company [Member]
Condensed Financial Statements Captions Line Items
Net income	48,862	39,526	33,526
Equity in undistributed earnings of subsidiary	(33,567)	(24,134)	(23,946)
Depreciation and amortization	153	152	149
Share-based compensation	1,406	1,301	1,174
Decrease (increase) in other assets	2,243	(175)	(1,673)
(Decrease) increase in other liabilities	(1,407)	1,548	(1,211)
Net cash provided by operating activities	17,690	18,218	8,019
Capital investment in subsidiaries	(350)	(803)	(38,405)
Purchases of premises and equipment	8	(19)	(44)
Net cash paid for acquisition		(4,503)
Net cash used in investing activities	(342)	(5,325)	(38,449)
Proceeds from issuance of common shares			38,303
Purchase of preferred and common shares	(293)	(114)	(157)
Proceeds from stock options exercised		320	413
Dividends paid	(17,260)	(16,409)	(13,958)
Net cash (used in) provided by financing activities	(17,553)	(16,203)	24,601
Net increase in cash and cash equivalents	(205)	(3,310)	(5,829)
Cash and cash equivalents, beginning of period	7,377	10,687	16,516
Cash and cash equivalents, end of period	$ 7,172	$ 7,377	$ 10,687

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