Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Deferred Compensation Arrangements	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2013	$ 67	$ 37,129	$ 95,657	$ (14,043)	$ 6,521	$ (5,720)	$ 119,611
Net income			12,125				12,125
Dividends paid			(7,085)				(7,085)
Purchase of treasury stock				(82)			(82)
Distribution of stock under deferred compensation arrangements & stock plans				553	(553)
Shares granted under stock plans and deferral of director fees, including excess tax benefit		275		164	22		461
Share based compensation expense				(122)	241		119
Dividend reinvestment plan				(335)	335
Other comprehensive income (loss)						672	672
Balance at Dec. 31, 2014	67	37,404	100,697	(13,865)	6,566	(5,048)	125,821
Net income			12,618				12,618
Dividends paid			(7,096)				(7,096)
Common stock and warrants issued for acquisition	5	17,428					17,433
Purchase of treasury stock				(41)			(41)
Distribution of stock under deferred compensation arrangements & stock plans				514	(514)
Shares granted under stock plans and deferral of director fees, including excess tax benefit		231		(81)	108		258
Share based compensation expense					36		36
Dividend reinvestment plan				(325)	325
Other comprehensive income (loss)						(975)	(975)
Balance at Dec. 31, 2015	72	55,063	106,219	(13,798)	6,521	(6,023)	148,054
Net income			14,883				14,883
Dividends paid			(7,695)				(7,695)
Exercise of warrants		324					324
Purchase of treasury stock				(155)			(155)
Distribution of stock under deferred compensation arrangements & stock plans				559	(559)
Shares granted under stock plans and deferral of director fees, including excess tax benefit		148		193	136		477
Share based compensation expense		271		103			374
Dividend reinvestment plan				(572)	572
Other comprehensive income (loss)						241	241
Balance at Dec. 31, 2016	$ 72	$ 55,806	$ 113,407	$ (13,670)	$ 6,670	$ (5,782)	$ 156,503