Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ (3,835)	$ (31,768)
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(655)	(1,475)
Foreign currency adjustments on intra-entity long-term investments	(1,818)	1,142
Unrealized losses on available-for-sale securities	(37)	(116)
Unrecognized gains on derivatives	106	715
Total other comprehensive income, net of tax	(2,404)	266
Comprehensive income (loss)	(6,239)	(31,502)
Clean Energy Fuels Corp
Net income (loss)	(3,871)	(31,905)
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(655)	(1,475)
Foreign currency adjustments on intra-entity long-term investments	(1,818)	1,142
Unrealized losses on available-for-sale securities	(37)	(116)
Unrecognized gains on derivatives	106	715
Total other comprehensive income, net of tax	(2,404)	266
Comprehensive income (loss)	(6,275)	(31,639)
Noncontrolling Interest
Net income (loss)	36	137
Other comprehensive income, net of tax:
Comprehensive income (loss)	$ 36	$ 137