Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance, at Dec. 31, 2011	$ 111	$ 47,349	$ 255,152	$ (28,169)	$ (4,628)	$ 269,815
Net income			16,188			16,188
Other comprehensive income (loss) net of tax:
Pension liability adjustment					(765)	(765)
Foreign currency translation adjustment					1,724	1,724
Issuance of Common shares, net of shares withheld for taxes		(3,247)		2,701		(546)
Stock based compensation and related excess tax benefit		2,188				2,188
Cash dividends on common stock paid to shareholders			(1,029)			(1,029)
Balance, at Dec. 31, 2012	111	46,290	270,311	(25,468)	(3,669)	287,575
Net income			29,290			29,290
Other comprehensive income (loss) net of tax:
Pension liability adjustment					2,561	2,561
Foreign currency translation adjustment					(3,475)	(3,475)
Issuance of Common shares, net of shares withheld for taxes		(1,410)		737		(673)
Stock based compensation and related excess tax benefit		2,359				2,359
Cash dividends on common stock paid to shareholders			(1,240)			(1,240)
Balance, at Dec. 31, 2013	111	47,239	298,361	(24,731)	(4,583)	316,397
Net income			25,656			25,656
Other comprehensive income (loss) net of tax:
Pension liability adjustment					(2,446)	(2,446)
Foreign currency translation adjustment					(4,863)	(4,863)
Issuance of Common shares, net of shares withheld for taxes		(2,467)		1,613		(854)
Stock based compensation and related excess tax benefit		3,343				3,343
Cash dividends on common stock paid to shareholders			(1,345)			(1,345)
Balance, at Dec. 31, 2014	$ 111	$ 48,115	$ 322,672	$ (23,118)	$ (11,892)	$ 335,888