CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 240,033	$ 108,522
Restricted cash	8,403	8,445
Short-term investments	138,240	38,175
Accounts receivable, net of allowance for doubtful accounts of $905 and $832 as of December 31, 2012 and December 31, 2013, respectively	53,473	57,594
Other receivables	26,285	17,808
Inventory, net	33,822	38,152
Prepaid expenses and other current assets	20,840	16,002
Total current assets	521,096	284,698
Land, property and equipment, net	487,854	428,177
Restricted cash		13,208
Notes receivable and other long-term assets	73,697	71,389
Investments in other entities		2,581
Goodwill	88,548	75,865
Intangible assets, net	79,770	99,282
Total assets	1,250,965	975,200
Current liabilities:
Current portion of long-term debt and capital lease obligations	23,401	30,389
Accounts payable	33,541	39,216
Accrued liabilities	46,745	30,794
Deferred revenue	16,419	13,521
Total current liabilities	120,106	113,920
Long-term debt and capital lease obligations, less current portion	532,017	300,636
Long-term debt, related party	65,000
Other long-term liabilities	15,304	14,014
Total liabilities	732,427	428,570
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value. Authorized 1,000,000 shares; issued and outstanding no shares
Common stock, $0.0001 par value. Authorized 149,000,000 shares; issued and outstanding 87,634,478 shares and 89,364,397 shares at December 31, 2012 and December 31, 2013, respectively	9	9
Additional paid-in capital	883,045	837,367
Accumulated deficit	(367,782)	(300,814)
Accumulated other comprehensive income (loss)	(700)	6,151
Total Clean Energy Fuels Corp. stockholders' equity	514,572	542,713
Noncontrolling interest in subsidiary	3,966	3,917
Total stockholders' equity	518,538	546,630
Total liabilities and stockholders' equity	$ 1,250,965	$ 975,200