Condensed Financial Statements Of Parent Company (Statements Of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 31,326	$ 31,866	$ 28,072
Adjustments to reconcile net earnings to net cash
Deferred tax benefit	(4,201)	103	(349)
Depreciation	3,223	2,614	2,168
Realized securities losses	(3,472)	(1,938)	(622)
Share-based compensation expense	527	590	391
Earnings on bank owned life insurance	(1,716)	(1,148)	(1,028)
(Increase) decrease in other assets	314	133	(320)
Increase in other liabilities	1,738	4,478	3,384
Net cash provided by operating activities	44,681	40,927	38,521
Proceeds from Sale of Debt Securities, Available-for-sale	124,809	142,423	107,559
CASH FLOWS FROM INVESTING ACTIVITIES
Principal payments received on securities available for sale	24,654	22,870	24,814
Purchases of premises and equipment	(8,637)	(9,218)	(5,545)
Proceeds from disposal of premises and equipment	293	860	42
Net cash provided by (used in) investing activities	(152,463)	(77,570)	(71,735)
CASH FLOWS FROM FINANCING ACTIVITIES
Payments of Ordinary Dividends, Common Stock	(8,786)	(7,361)	(6,545)
Exercise of stock options	0	7	122
Repayment of long-term borrowings	(21,301)	(18)	(45,016)
Payments for Repurchase of Common Stock	(1,444)	(10,405)	(1,689)
Proceeds from issuance of common stock, net of issuance costs	178	159	237
Net cash provided by (used in) financing activities	145,681	38,991	40,123
Cash and Cash Equivalents, at Carrying Value	99,787	61,888
Supplemental Disclosures of Cash Flow Information
Interest	19,975	29,855	25,426
Proceeds from Issuance of Subordinated Long-term Debt	30,000	0	0
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	31,326	31,866	28,072
Adjustments to reconcile net earnings to net cash
Equity in undistributed net income of subsidiaries	(23,333)	(17,941)	(18,979)
Deferred tax benefit	(141)	(18)	(8)
Depreciation	57	50	41
Share-based compensation expense	211	274	181
Earnings on bank owned life insurance	1	0	7
(Increase) decrease in other assets	(285)	491	(375)
Increase in other liabilities	977	807	1,036
Net cash provided by operating activities	8,813	15,529	9,975
Investments from Subsidiaries	(25,000)	0	0
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of premises and equipment	(9)	(123)	(86)
Proceeds from disposal of premises and equipment	0	53	13
Net cash provided by (used in) investing activities	(25,009)	(70)	(73)
CASH FLOWS FROM FINANCING ACTIVITIES
Payments of Ordinary Dividends, Common Stock	(8,786)	(7,361)	(6,545)
Exercise of stock options	0	7	122
Payments for Repurchase of Common Stock	(1,444)	(10,405)	(1,689)
Proceeds from issuance of common stock, net of issuance costs	178	159	237
Net cash provided by (used in) financing activities	19,948	(17,600)	(7,875)
Increase (decrease) in cash	3,752	(2,141)	2,027
Cash and Cash Equivalents, at Carrying Value	5,937	2,185	4,326	$ 2,299
Cash, Ending Balance	5,937	2,185
Supplemental Disclosures of Cash Flow Information
Interest	1,145	961	875
Proceeds from Issuance of Subordinated Long-term Debt	$ 30,000	$ 0	$ 0