CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME / (LOSS) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income (loss)	$ 57,266	$ (34,404)	$ 34,291
Other comprehensive income:
Foreign currency translation adjustments, net of $0 tax in 2013, 2012 and 2011	(29)	79	(35)
Unrealized gain on marketable securities, net of $0 tax in 2013, 2012 and 2011	72	138	0
Unrealized actuarial loss on pension benefits, net of tax of $61, $155 and $0 in 2013, 2012 and 2011, respectively (Note 13)	(220)	(560)	0
Total other comprehensive loss	(177)	(343)	(35)
Total comprehensive income (loss)	57,089	(34,747)	34,256
Foreign currency translation adjustment, tax	0	0	0
Unrealized gain on marketable securities, tax	0	0	0
Unrealized actuarial loss on pension benefits, tax	$ 61	$ 155	$ 0