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, 2010	$ 111	$ 47,286	$ 233,279	$ (23,861)	$ (1,068)	$ 255,747
Net income			22,895			22,895
Other comprehensive income (loss) net of tax:
Pension liability adjustments					(2,254)	(2,254)
Foreign currency translation adjustment					(1,306)	(1,306)
Purchase of Common shares for Treasury				(6,480)		(6,480)
Issuance of Common shares, net of shares withheld for taxes		(2,320)		2,172		(148)
Stock based compensation and related excess tax benefit		2,383				2,383
Cash dividends on common stock paid to shareholders			(1,022)			(1,022)
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 adjustments					(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 adjustments					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