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Condensed Consolidating Financial Information - Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (31,325)	$ 47,852	$ (5,806)	$ 130,410
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	(28,078)	54,668	(17,543)	129,948
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(31,325)	47,852	(5,806)	130,410
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	(28,078)	54,668	(17,543)	129,948
Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	22	369	238	241
Foreign currency translation adjustment	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Comprehensive (loss) income	22	369	238	241
Non-Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	(8,516)	(2,229)	(12,660)	(4,226)
Foreign currency translation adjustment	3,247	6,816	(11,737)	(462)
Other comprehensive income (loss)	3,247	6,816	(11,737)	(462)
Comprehensive (loss) income	(5,269)	4,587	(24,397)	(4,688)
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	8,494	1,860	12,422	3,985
Foreign currency translation adjustment	(3,247)	(6,816)	11,737	462
Other comprehensive income (loss)	(3,247)	(6,816)	11,737	462
Comprehensive (loss) income	$ 5,247	$ (4,956)	$ 24,159	$ 4,447

X

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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