CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income (loss)	$ 16,654	$ (44,406)	$ 41,229	$ (44,121)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of $0 tax in the quarter and year to date ended September 30, 2013 and 2012 (Note 2)	118	114	(46)	47
Unrealized gain (loss) on marketable securities, net of $0 tax in the quarter and year to date ended September 30, 2013 and 2012 (Note 2)	196	28	(62)	190
Amortization of defined benefit pension items, net of tax of $4 and $12 in the quarter and year to date ended September 30, 2013 and $0 in both periods in 2012, respectively (Note 2)	15	0	43	0
Total other comprehensive income (loss)	329	142	(65)	237
Total comprehensive income (loss)	$ 16,983	$ (44,264)	$ 41,164	$ (43,884)