Subsidiary Guarantors - Improper Calculation - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Adjustments to reconcile net income (loss) to net cash provided by operating activities	$ 170,325	$ 16,132
Issuers
Cash flows from operating activities
Adjustments to reconcile net income (loss) to net cash provided by operating activities	(2,685)	(86,767)
Eliminations
Cash flows from operating activities
Adjustments to reconcile net income (loss) to net cash provided by operating activities	$ (181,826)	(11,979)
Improper Calculation | Restatement Adjustment | Issuers
Cash flows from operating activities
Adjustments to reconcile net income (loss) to net cash provided by operating activities		(5,800)
Improper Calculation | Restatement Adjustment | Eliminations
Cash flows from operating activities
Adjustments to reconcile net income (loss) to net cash provided by operating activities		$ 5,800