Consolidated Statements of Changes in Shareholders' Equity QTD Statement - USD ($) $ in Thousands	Total		Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2017	$ 208,717		$ 8,604	$ 76,179	$ 127,010	$ (3,076)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,577				17,577
Other comprehensive income (loss)	(5,426)					(5,426)
Stock options exercised	861		35	826
Vesting of restricted stock			11	(11)
Equity based compensation	859		11	848
Cash dividends paid	(6,522)				(6,522)
Ending Balance at Sep. 30, 2018	216,066		8,661	77,842	138,715	(9,152)
Beginning Balance at Jun. 30, 2018	213,348		8,654	77,496	135,108	(7,910)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,785				5,785
Other comprehensive income (loss)	(1,242)					(1,242)
Stock options exercised	86		3	83
Vesting of restricted stock			1	(1)
Equity based compensation	267		3	264
Cash dividends paid	(2,178)				(2,178)
Ending Balance at Sep. 30, 2018	216,066		8,661	77,842	138,715	(9,152)
Beginning Balance at Dec. 31, 2018	222,542	[1]	8,668	78,172	141,537	(5,835)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,465				13,465
Other comprehensive income (loss)	5,196					5,196
Stock repurchased	(1,138)		(32)	(1,106)
Stock options exercised	609		32	577
Vesting of restricted stock			21	(21)
Equity based compensation	1,204		12	1,192
Cash dividends paid	(7,972)				(7,972)
Ending Balance at Sep. 30, 2019	317,246		11,063	159,792	147,030	(639)
Beginning Balance at Jun. 30, 2019	311,917		11,089	160,572	141,339	(1,083)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,692				8,692
Other comprehensive income (loss)	444					444
Stock repurchased	(1,138)		(32)	(1,106)
Stock options exercised	31		2	29
Vesting of restricted stock			1	(1)
Equity based compensation	301		3	298
Cash dividends paid	(3,001)				(3,001)
Ending Balance at Sep. 30, 2019	$ 317,246		$ 11,063	$ 159,792	$ 147,030	$ (639)

[1] Derived from audited consolidated financial statements.