Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1,2018 | Accounting Standards Update 2016-01 [Member]			$ 16,993	$ (16,993)
Reclassification of certain tax effects from accumulated other comprehensive income at January 1,2018			(2,619)	2,619
Balance at Dec. 31, 2017	$ 3,757	$ 123,180	136,474	12,234	$ (24,527)	$ 251,118
Beginning balance (in shares) at Dec. 31, 2017	20,873				2,704
Acquisition of treasury stock					$ (1,807)	(1,807)
Acquisition of treasury shares (in shares)					187
Equity incentive plan activity		152				152
Shares issued under employee benefit plans		(164)			$ 406	242
Shares issued under employee benefit plans, shares					(45)
Net (loss) income			10,347			10,347
Other comprehensive income (loss), net of tax				(4,520)		(4,520)
Ending balance at Dec. 31, 2018	$ 3,757	123,168	161,195	(6,660)	$ (25,928)	255,532
Ending balance (in shares) at Dec. 31, 2018	20,873				2,846
Acquisition of treasury stock					$ (1,380)	(1,380)
Acquisition of treasury shares (in shares)					134
Equity incentive plan activity		887				887
Shares issued under employee benefit plans		(587)			$ 2,107	1,520
Shares issued under employee benefit plans, shares					(230)
Net (loss) income			(625)			(625)
Other comprehensive income (loss), net of tax				7,348		7,348
Ending balance at Dec. 31, 2019	$ 3,757	$ 123,468	$ 160,570	$ 688	$ (25,201)	$ 263,282
Ending balance (in shares) at Dec. 31, 2019	20,873				2,750