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Income Taxes Deferred Tax Assets and Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Tax Assets, Gross [Abstract]    
Federal and state tax loss carryforwards $ 95,629us-gaap_DeferredTaxAssetsOperatingLossCarryforwards $ 76,570us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Employee benefits 395,806us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits 313,760us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
Allowance for doubtful accounts 3,613us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts 5,290us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax and Other 4,808frp_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxAndOther 4,925frp_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxAndOther
Deferred Tax Assets, Capitalized Restructuring Costs 3,355frp_DeferredTaxAssetsCapitalizedRestructuringCosts 3,973frp_DeferredTaxAssetsCapitalizedRestructuringCosts
Deferred Tax Assets, Accrued Professional Services 0frp_DeferredTaxAssetsAccruedProfessionalServices 3,838frp_DeferredTaxAssetsAccruedProfessionalServices
Service quality rebate reserve 3,896us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves 1,719us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves
Other, net 3,492us-gaap_DeferredTaxAssetsOther 7,527us-gaap_DeferredTaxAssetsOther
Total gross deferred tax assets 510,599us-gaap_DeferredTaxAssetsGross 417,602us-gaap_DeferredTaxAssetsGross
Deferred Tax Liabilities, Gross [Abstract]    
Property, plant, and equipment 235,524us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment 269,908us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Goodwill and other intangible assets 33,003us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets 36,121us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Other, net 9,808us-gaap_DeferredTaxLiabilitiesOther 12,498us-gaap_DeferredTaxLiabilitiesOther
Total gross deferred tax liabilities 278,335us-gaap_DeferredIncomeTaxLiabilities 318,527us-gaap_DeferredIncomeTaxLiabilities
Deferred Tax Assets (Liabilities), Gross 232,264frp_DeferredTaxAssetsLiabilitiesGross 99,075frp_DeferredTaxAssetsLiabilitiesGross
Valuation allowance (259,857)us-gaap_DeferredTaxAssetsValuationAllowance (166,773)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax liabilities $ (27,593)us-gaap_DeferredTaxLiabilities $ (67,698)us-gaap_DeferredTaxLiabilities