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Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net income $ 17,808us-gaap_NetIncomeLoss $ 5,244us-gaap_NetIncomeLoss $ 6,065us-gaap_NetIncomeLoss
Other comprehensive (loss) income:      
Unrealized (loss) gain on effective portion of fuel hedges, net of tax of $9,892, $567, and $2,100 in 2014, 2013 and 2012 , respectively (15,869)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax 909us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax 3,369us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
Reclassification of fuel hedge losses (gains) into statement of operations, net of tax of $1,206, $247, and $1,932 in 2014, 2013, and 2012, respectively 1,935us-gaap_PriceRiskCashFlowHedgeGainOrLossReclassifiedToEarningsNet (396)us-gaap_PriceRiskCashFlowHedgeGainOrLossReclassifiedToEarningsNet (3,099)us-gaap_PriceRiskCashFlowHedgeGainOrLossReclassifiedToEarningsNet
Total other comprehensive (loss) income (13,934)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent 513us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent 270us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Comprehensive income $ 3,874us-gaap_ComprehensiveIncomeNetOfTax $ 5,757us-gaap_ComprehensiveIncomeNetOfTax $ 6,335us-gaap_ComprehensiveIncomeNetOfTax