Description of Business and Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reduction to cash and cash equivalents	$ (739,553)	$ (602,232)	$ (764,522)	$ (640,190)
Increase (decrease) in net cash provided by operating activities	154,006	63,493
Increase (decrease) in net cash used in financing activities	$ (119,503)	(60,825)
Capitalization period	8 years
Accounting Standards Update 2016-09
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in net cash provided by operating activities		5,000
Increase (decrease) in net cash used in financing activities		(5,000)
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reduction to cash and cash equivalents		$ 11,000		$ 10,000