CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $) In Thousands	Total	Capital Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2012	$ 434,152	$ 16,904	$ 74,272	$ 400,784	$ (57,808)
Net income (loss)	7,096			7,096
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(8,370)				(8,370)
Stock options exercised	3,420	104	3,316
Shares issued for employees stock purchase plan	390	15	375
Shares issued for restricted stock	(1,005)	47	(1,052)
Stock-based compensation expense	688		688
Ending Balance at Mar. 31, 2013	$ 436,371	$ 17,070	$ 77,599	$ 407,880	$ (66,178)