Condensed Financial Statements Of Parent Company (Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Other investments	$ 16,635	$ 15,071
Premises and equipment	37,553	34,209
Other assets	12,938	11,329
Total assets	2,200,586	2,134,240
Long-term borrowings	735	45,751
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Other liabilities	16,522	16,295
Total liabilities	1,980,756	1,932,735
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: 2018 - 12,399,887 shares, 2017 - 12,465,296 shares; outstanding: 2018 - 12,312,933 shares, 2017 - 12,358,562 shares	80,431	81,098
Unearned ESOP Shares	(939)	(1,152)
Retained earnings	141,354	119,827
Accumulated other comprehensive income	(1,016)	1,732	$ (3,262)
Total shareholders' equity	219,830	201,505	$ 155,360	$ 143,744
Total liabilities and shareholders' equity	2,200,586	2,134,240
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash	4,326	2,299
Investment in subsidiaries	236,422	219,980
Other investments	77	77
Premises and equipment	126	94
Other assets	1,365	1,318
Total assets	242,316	223,768
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Other liabilities	2,897	2,674
Total liabilities	22,486	22,263
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: 2018 - 12,399,887 shares, 2017 - 12,465,296 shares; outstanding: 2018 - 12,312,933 shares, 2017 - 12,358,562 shares	80,431	81,098
Unearned ESOP Shares	(939)	(1,152)
Retained earnings	141,354	119,827
Accumulated other comprehensive income	(1,016)	1,732
Total shareholders' equity	219,830	201,505
Total liabilities and shareholders' equity	$ 242,316	$ 223,768