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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
Consolidated Statements Of Comprehensive Income      
Net income $ 29,516us-gaap_NetIncomeLoss $ 21,005us-gaap_NetIncomeLoss $ 69,408us-gaap_NetIncomeLoss
Other comprehensive income (loss); change in funded status of pension plan, net of ($2,654), $3,044 and ($150) in tax for 2014, 2013 and 2012, respectively (3,956)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax 4,542us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax 2,898us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
Comprehensive income $ 25,560us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest $ 25,547us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest $ 72,306us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest