Description of Business and Basis of Presentation (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reduction to cash and cash equivalents	$ (612,987)	$ (650,557)	$ (845,732)	$ (1,054,118)
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reduction to cash and cash equivalents			$ 26,000	$ 25,000
Other Noncurrent Assets | Accounting Standards Update 2015-03
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Debt issuance costs, reclassified		(18,000)
Long-term Debt | Accounting Standards Update 2015-03
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Debt issuance costs, reclassified		$ 18,000