Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 182,780		$ 17,840		$ (23,957)
Other comprehensive income (loss), net of tax:
Foreign currency translation	(231)	[1]	(10)	[1]	148	[1]
Defined benefit pension plan:
Net gain/(loss) arising during the period	(344)		(137)		459
Effect of curtailment	0		360		(59)
Amortization of prior service cost included in net periodic pension cost	0		23		23
Total defined benefit pension plan	(344)	[1]	246	[1]	423	[1]
Total other comprehensive income, net of tax	(575)		236		571
Comprehensive income (loss)	$ 182,205		$ 18,076		$ (23,386)

[1] During the periods presented, the Company did not have material reclassifications out of other comprehensive income.