Condensed Financial Statements Of Parent Company (Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Other investments	$ 12,972	$ 16,635
Premises and equipment	44,168	37,553
Other assets	12,025	12,938
Total assets	2,403,492	2,200,586
Long-term borrowings	717	735
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Other liabilities	22,840	16,522
Total liabilities	2,155,728	1,980,756
Preferred stock, $1.00 par value, authorized 250,000 shares	0	0
Common stock and related surplus, $2.50 par value; authorized 20,000,000 shares; issued: 2019 - 12,474,641 shares, 2018 - 12,399,887 shares; outstanding: 2019 - 12,408,542 shares, 2018 - 12,312,933 shares	80,084	80,431
Unearned ESOP Shares	(714)	(939)
Retained earnings	165,859	141,354
Accumulated other comprehensive income	2,535	(1,016)	$ 1,732
Total shareholders' equity	247,764	219,830	$ 201,505	$ 155,360
Total liabilities and shareholders' equity	2,403,492	2,200,586
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash	2,185	4,326
Investment in subsidiaries	267,132	236,422
Other investments	77	77
Premises and equipment	146	126
Other assets	1,317	1,365
Total assets	270,857	242,316
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Other liabilities	3,504	2,897
Total liabilities	23,093	22,486
Preferred stock, $1.00 par value, authorized 250,000 shares	0	0
Common stock and related surplus, $2.50 par value; authorized 20,000,000 shares; issued: 2019 - 12,474,641 shares, 2018 - 12,399,887 shares; outstanding: 2019 - 12,408,542 shares, 2018 - 12,312,933 shares	80,084	80,431
Unearned ESOP Shares	(714)	(939)
Retained earnings	165,859	141,354
Accumulated other comprehensive income	2,535	(1,016)
Total shareholders' equity	247,764	219,830
Total liabilities and shareholders' equity	$ 270,857	$ 242,316