Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2016	$ 128,619	$ (609)		$ 125,380	$ 253,390
Net income				18,963	18,963
Payment of dividends				(878)	(878)
Employee stock purchase (1 shares)	10				10
Stock-based compensation	824	272			1,096
Other				2	2
Balance at Dec. 31, 2017	129,453	(337)		143,467	272,583
Net income				33,759	33,759
Payment of dividends				(880)	(880)
Stock-based compensation	1,324	205			1,529
Other	1			(1)
Balance at Dec. 31, 2018	130,778	(132)		176,345	306,991
Net income				3,856	3,856
Payment of dividends				(879)	(879)
Stock-based compensation	869	1,319			2,188
Other				(1)	(1)
Stock repurchase		(1,522)			(1,522)
Change in fair value of hedges			(2,281)		(2,281)
Balance at Dec. 31, 2019	$ 131,647	$ (335)	$ (2,281)	$ 179,321	$ 308,352