Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net loss	$ (57,750)	$ (306,282)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	68,498	16,033
Stock-based compensation	55,566	35,729
Amortization of Department of Energy (DOE) loan origination costs	5,558
Inventory write-downs	6,788	4,089
Amortization of discount on convertible debt	5,344
Change in fair value of DOE warrant liability	(10,692)	896
Other non-cash operating activities	2,205	1,377
Changes in operating assets and liabilities
Accounts receivable	(20,738)	375
Inventories and operating lease vehicles	(358,417)	(104,032)
Prepaid expenses and other current assets	(8,900)	1,751
Other assets	38	(146)
Accounts payable	27,322	73,351
Accrued liabilities	34,188	(1,834)
Deferred revenue	190,072	(109)
Customer deposits	1,461	46,577
Resale value guarantee	159,010
Other long-term liabilities	28,679	3,635
Net cash provided by (used in) operating activities	128,232	(228,590)
Cash Flows From Investing Activities
Purchases of property and equipment, excluding capital leases	(174,790)	(175,175)
Withdrawals out of our dedicated DOE accounts, net	14,752	8,472
Decrease (increase) in other restricted cash	126	(4,478)
Purchases of marketable securities		(14,992)
Maturities of short-term marketable securities		40,000
Net cash used in investing activities	(159,912)	(146,173)
Cash Flows From Financing Activities
Proceeds from convertible debt	660,000
Proceeds from issuance of warrants	120,318
Purchase of convertible note hedges	(177,540)
Proceeds from issuance of common stock in public offering	360,000
Proceeds from issuance of common stock in private placement	55,000
Common stock and convertible debt issuance costs	(16,374)
Principal payments on DOE loans	(452,337)
Proceeds from exercise of stock options and other stock issuances	82,219	18,078
Principal payments on capital leases and other debt	(6,380)	(1,684)
Proceeds from DOE loans		188,796
Net cash provided by financing activities	624,906	205,190
Net increase (decrease) in cash and cash equivalents	593,226	(169,573)
Cash and cash equivalents at beginning of period	201,890	255,266
Cash and cash equivalents at end of period	795,116	85,693
Supplemental disclosure of noncash investing activities:
Acquisition of property and equipment included in accounts payable and accrued liabilities	$ 24,708	$ 36,240