Description of Business and Basis of Presentation (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reduction to cash and cash equivalents	$ (840,564)	$ (663,716)	$ (764,522)	$ (640,190)
Increase (decrease) in net cash provided by operating activities	184,647	158,584
Increase (decrease) in net cash used in financing activities	$ 91,371	(121,017)
Capitalization period	8 years
Estimated amortization period, less than	1 year
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		$ 12,000		$ 10,000