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Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net income (loss) $ 5,244 $ 6,065 $ (14,267)
Other comprehensive income (loss):      
Unrealized gain on effective portion of fuel hedges, net of tax of $567, $2,100, and $935 in 2013, 2012 and 2011 , respectively 909 3,369 1,500
Reclassification of fuel hedge gains into statement of operations, net of tax of $247, $1,932, and $1,200 in 2013, 2012, and 2011, respectively (396) (3,099) (1,926)
Total other comprehensive income (loss) 513 270 (426)
Comprehensive income (loss) $ 5,757 $ 6,335 $ (14,693)