Consolidated Statement Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at Dec. 31, 2012	$ 405	$ 457,669	$ (237,170)	$ 270,744	$ 15,628	$ 507,276
Issuance of 56 shares of common stock pursuant to the exercise of employee stock options		913				913
Purchase of 322 treasury shares			(7,146)			(7,146)
Stock-based compensation		2,039				2,039
Income tax benefit from stock based compensation		(123)				(123)
Other	2	(2)
Net income				8,426		8,426
Other Comprehensive loss					(1,878)	(1,878)
Total Comprehensive income						6,548
Balance at Mar. 31, 2013	$ 407	$ 460,496	$ (244,316)	$ 279,170	$ 13,750	$ 509,507