Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 01, 2016
Summary of Significant Accounting Policies [Line Items]
Property and equipment per unit value, minimum	$ 1,000
Property, plant and equipment, estimated useful life, minimum (in years)	1 year
Minimum percentage of tax benefit to be recognized (in percentage)	50.00%
Increase to cash flows from operating activities	$ 866,298,000	$ 764,151,000	$ 658,070,000
Decrease to cash flows from financing activities	$ 354,265,000	$ 267,728,000	$ (436,027,000)
Sales | Customer concentration risk | No Customer [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percent (more than)	10.00%	10.00%	10.00%
Accounts receivable | Customer concentration risk | No Customer [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk percent (more than)	10.00%	10.00%
Accounting Standards Update 2016-09 [Member]
Summary of Significant Accounting Policies [Line Items]
Increase to cash flows from operating activities	$ 5,500,000	$ 29,300,000
Decrease to cash flows from financing activities	$ 5,500,000	$ 29,300,000
Other Assets [Member] | Adjustments for New Accounting Pronouncement [Member]
Summary of Significant Accounting Policies [Line Items]
Amount of deferred financing costs reclassified				$ (6,200,000)
Convertible Senior Notes [Member] | Adjustments for New Accounting Pronouncement [Member]
Summary of Significant Accounting Policies [Line Items]
Amount of deferred financing costs reclassified				$ 6,200,000