Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2016

Accounting Policies [Abstract]

Schedule of Activity Related to Resale Value Guarantee Program

Account activity related to our resale value guarantee and similar programs consisted of the following for the periods presented (in thousands):

	Three Months Ended			Six Months Ended
	June 30, 2016			June 30, 2016
Operating Lease Vehicles
Operating lease vehicles—beginning of period	$	1,909,310		$	1,556,529
Net increase in operating lease vehicles		291,036			705,017
Depreciation expense recorded in cost of automotive revenues		(57,568	)		(102,386	)
Additional depreciation expense recorded in cost of automotive revenues as a result of    early cancellation of resale value guarantee		(2,571	)		(5,657	)
Increases to inventory from vehicles returned under our trade-in program		(13,626	)		(26,922	)
Operating lease vehicles—end of period	$	2,126,581		$	2,126,581
Deferred Revenue
Deferred revenue—beginning of period	$	800,968		$	679,132
Net increase in deferred revenue from new vehicle deliveries and reclassification of    collateralized borrowing from long-term to short-term		165,875			391,639
Amortization of deferred revenue and short-term collateralized borrowing recorded in    automotive revenue		(108,852	)		(206,600	)
Additional revenue recorded in automotive revenue as a result of early cancellation of    resale value guarantee		(3,424	)		(6,420	)
Recognition of deferred revenue resulting from return of vehicle under trade-in program		(2,883	)		(6,067	)
Deferred revenue—end of period	$	851,684		$	851,684
Resale Value Guarantee
Resale value guarantee liability—beginning of period	$	1,775,498		$	1,430,573
Net increase in resale value guarantee		270,436			651,935
Reclassification from long-term to short-term collateralized borrowing		(23,216	)		(46,042	)
Additional revenue recorded in automotive revenue as a result of early cancellation of    resale value guarantee		(3,318	)		(5,819	)
Release of resale value guarantee resulting from return of vehicle under trade-in program		(12,053	)		(23,300	)
Resale value guarantee liability—end of period	$	2,007,347		$	2,007,347

Schedule of Accrued Warranty Activity

Accrued warranty activity consisted of the following for the periods presented (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Accrued warranty—beginning of period	$	198,705		$	155,301		$	180,754		$	129,043
Warranty costs incurred		(24,459	)		(17,287	)		(40,163	)		(29,073	)
Net changes in liability for pre-existing warranties, including expirations and foreign exchange impact		3,250			567			6,634			11,329
Provision for warranty		38,963			26,014			69,234			53,296
Accrued warranty—end of period	$	216,459		$	164,595		$	216,459		$	164,595

Schedule of Potential Weighted Common Shares Outstanding that were Excluded from Computation of Diluted Net Loss per Share of Common Stock

The following table presents the potential weighted common shares outstanding that were excluded from the computation of diluted net loss per share of common stock for the periods presented.

	Three Months Ended June 30,				Six Months Ended  June 30,
	2016		2015		2016		2015
Employee share based awards		11,345,742		14,339,572		13,538,610		14,396,259
Convertible senior notes		2,345,823		2,517,573		2,150,258		2,301,823
Warrants issued May 2013		998,101		1,177,659		702,123		858,019