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Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net loss	$ (1,959)	$ (640)
Other comprehensive income:
Unrealized gain on effective portion of fuel hedges, net of tax of $251 and $1,100 in 2013 and 2012, respectively	403	2,864
Reclassification of fuel hedge gains into statement of operations, net of tax of $108 and $300 in 2013 and 2012, respectively	(280)	(782)
Total other comprehensive income	123	2,082
Comprehensive (loss) income	$ (1,836)	$ 1,442

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