Parent Company Financial Information (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements Captions Line Items
Net income	$ 38,332	$ 48,862	$ 39,526
Depreciation and amortization	7,893	8,213	6,477
Share-based compensation	1,333	1,406	1,301
(Increase) decrease in other assets	(37,565)	(21,263)	13,376
Increase (Decrease) in other liabilities	10,646	14,973	3,065
Net cash provided by operating activities	43,455	57,710	65,139
Purchases of premises and equipment	(4,264)	(3,639)	(2,842)
Net cash paid for acquisition			(4,447)
Net cash used in investing activities	(531,071)	(24,733)	(225,409)
Issuance of long-term debt, net of issuance costs	35,000
Proceeds from stock options exercised			320
Net cash provided by (used in) financing activities	468,547	(22,785)	163,830
Net (decrease) increase in cash and cash equivalents	(19,069)	10,192	3,560
Cash and cash equivalents, beginning of period	112,947	102,755	99,195
Cash and cash equivalents, end of period	93,878	112,947	102,755
Parent Company [Member]
Condensed Financial Statements Captions Line Items
Net income	38,332	48,862	39,526
Equity in undistributed earnings of subsidiary	(19,725)	(33,567)	(24,134)
Depreciation and amortization	209	153	152
Share-based compensation	1,333	1,406	1,301
(Increase) decrease in other assets	(48)	2,243	(175)
Increase (Decrease) in other liabilities	497	(1,407)	1,548
Net cash provided by operating activities	20,598	17,690	18,218
Capital investment in subsidiaries	(11,966)	(350)	(803)
Purchases of premises and equipment	(11)	8	(19)
Net cash paid for acquisition			(4,503)
Net cash used in investing activities	(11,977)	(342)	(5,325)
Issuance of long-term debt, net of issuance costs	34,221
Purchase of preferred and common shares	(209)	(293)	(114)
Proceeds from stock options exercised			320
Dividends paid	(17,957)	(17,260)	(16,409)
Net cash provided by (used in) financing activities	16,055	(17,553)	(16,203)
Net (decrease) increase in cash and cash equivalents	24,676	(205)	(3,310)
Cash and cash equivalents, beginning of period	7,172	7,377	10,687
Cash and cash equivalents, end of period	$ 31,848	$ 7,172	$ 7,377