CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $) In Thousands, unless otherwise specified	Total	Capital Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2011	$ 338,256	$ 16,221	$ 52,738	$ 332,099	$ (62,802)
Comprehensive income (loss):
Net income (loss)	63,622			63,622
Other comprehensive income (loss):
Pension and other post-employment benefits	2,023				2,023
Foreign currency translation, net of tax	532				532
Unrealized loss on marketable securities, net of tax	1,168				1,168
Unrealized loss on derivative instruments, net of tax	(85)				(85)
Total comprehensive income (loss)	67,260			63,622	3,638
Stock options exercised	7,926	285	7,641
Stock issued to directors		15	(15)
Shares issued for employees stock purchase plan	413	15	398
Shares issued for restricted stock	(755)	34	(789)
Stock-based compensation expense	3,775		3,775
Ending Balance at Sep. 30, 2012	$ 416,875	$ 16,570	$ 63,748	$ 395,721	$ (59,164)