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Long Term Debt (Narrative) (Details) (USD $)
0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 14, 2013
Feb. 14, 2013
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2014
Jan. 24, 2011
Feb. 15, 2013
Schedule of Available-for-sale Securities [Line Items]              
Available for borrowing under the Revolving Facility         $ 58,800,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity    
Outstanding letters of credit         16,200,000frp_LetterOfCreditOutstanding    
Long-term Debt       918,122,000us-gaap_LongTermDebt 914,590,000us-gaap_LongTermDebt    
Repayments of debt   946,500,000us-gaap_RepaymentsOfDebt          
Interest paid   7,700,000us-gaap_InterestPaid          
Payments of debt issuance costs   32,600,000us-gaap_PaymentsOfDebtIssuanceCosts          
Base interest rate under condition LIBOR            
Principal payment on the term loan     10,500,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal        
Deferred finance costs, noncurrent, gross 7,600,000us-gaap_DeferredFinanceCostsNoncurrentGross 7,600,000us-gaap_DeferredFinanceCostsNoncurrentGross          
Amortization period of debt issue costs, effective method 6 years 2 months 12 days            
Debt issue costs, net of amortization       7,101,000us-gaap_DeferredFinanceCostsNoncurrentNet 5,949,000us-gaap_DeferredFinanceCostsNoncurrentNet    
Condition One              
Schedule of Available-for-sale Securities [Line Items]              
Base interest rate under condition       LIBOR      
Point in addition to base interest rate under condition       4.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Condition Two, Subcondition One              
Schedule of Available-for-sale Securities [Line Items]              
Base interest rate under condition       Bank of America's prime rate      
Point in addition to base interest rate under condition       3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Condition Two, Subcondition Two              
Schedule of Available-for-sale Securities [Line Items]              
Interest rate in addition to Libor under subcondition two of condition two         0.50%frp_InterestRateInAdditionToLiborUnderSubconditionTwoOfConditionTwo
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Condition Two, Subcondition Three              
Schedule of Available-for-sale Securities [Line Items]              
Base interest rate under condition       LIBOR      
Point in addition to base interest rate under condition       1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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London Interbank Offered Rate (LIBOR)              
Schedule of Available-for-sale Securities [Line Items]              
Point in addition to base interest rate under condition 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Federal Funds Effective Rate              
Schedule of Available-for-sale Securities [Line Items]              
Point in addition to base interest rate under condition 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Senior Notes              
Schedule of Available-for-sale Securities [Line Items]              
Face amount 300,000,000.0us-gaap_DebtInstrumentFaceAmount
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300,000,000.0us-gaap_DebtInstrumentFaceAmount
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Interest rate on Notes 8.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
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8.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
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  8.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
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8.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
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Letter of Credit | Revolving Credit Facility              
Schedule of Available-for-sale Securities [Line Items]              
Credit agreement outstanding 40,000,000.0us-gaap_LineOfCredit
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Senior secured credit facility | Revolving Credit Facility | Bank of America Syndicate              
Schedule of Available-for-sale Securities [Line Items]              
Maximum borrowing capacity           75,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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Term Loan under the Credit Agreement | Term Loan              
Schedule of Available-for-sale Securities [Line Items]              
Face amount           1,000,000,000.0us-gaap_DebtInstrumentFaceAmount
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Term Loan under the Credit Agreement | Condition One              
Schedule of Available-for-sale Securities [Line Items]              
Minimum floor interest rate on Term Loan under condition one       2.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
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Line of Credit | Revolving Credit Facility              
Schedule of Available-for-sale Securities [Line Items]              
Credit agreement outstanding 75,000,000.0us-gaap_LineOfCredit
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Line of Credit | Revolving Credit Facility | Minimum              
Schedule of Available-for-sale Securities [Line Items]              
Interest rate on Notes 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
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4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
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Fronting fee, percentage 0.125%frp_DebtInstrumentFrontingFeePercentage
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0.125%frp_DebtInstrumentFrontingFeePercentage
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Line of Credit | Revolving Credit Facility | Maximum              
Schedule of Available-for-sale Securities [Line Items]              
Interest rate on Notes 5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
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Line of Credit | Revolving Credit Facility | Consolidated Total Leverage Ratio Covenant              
Schedule of Available-for-sale Securities [Line Items]              
Number of restrictive covenants 2frp_DebtInstrumentsRetrictiveCovenantsNumber
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2frp_DebtInstrumentsRetrictiveCovenantsNumber
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Line of Credit | Revolving Credit Facility | Prior to March 31, 2013              
Schedule of Available-for-sale Securities [Line Items]              
Percentage commitment fee on average daily unused portion of exit revolving facility 0.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
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Line of Credit | Revolving Credit Facility | After March 31, 2013              
Schedule of Available-for-sale Securities [Line Items]              
Percentage commitment fee on average daily unused portion of exit revolving facility 0.375%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
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Notes Payable to Banks | Term Loan              
Schedule of Available-for-sale Securities [Line Items]              
Long-term Debt 640,000,000us-gaap_LongTermDebt
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640,000,000us-gaap_LongTermDebt
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Increase, Additional Borrowings 640,000,000.0us-gaap_ProceedsFromLinesOfCredit
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Maximum borrowing capacity 200,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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Notes Payable to Banks | Term Loan | Minimum              
Schedule of Available-for-sale Securities [Line Items]              
Interest rate on Notes 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
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Notes Payable to Banks | Term Loan | Maximum              
Schedule of Available-for-sale Securities [Line Items]              
Interest rate on Notes 6.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
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Notes, 8.75%, due 2019 | London Interbank Offered Rate (LIBOR) | Term Loan              
Schedule of Available-for-sale Securities [Line Items]              
Point in addition to base interest rate under condition 1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Notes, 8.75%, due 2019 | Senior Notes              
Schedule of Available-for-sale Securities [Line Items]              
Face amount 300,000,000.0us-gaap_DebtInstrumentFaceAmount
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Interest rate on Notes 8.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
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Notes, 8.75%, due 2019 | Senior Notes | Prior to February 15, 2016              
Schedule of Available-for-sale Securities [Line Items]              
Redemption price 108.75%us-gaap_DebtInstrumentRedemptionPricePercentage
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Percent of principal             100.00%frp_DebtInstrumentDefaultRedemptionPercentOfPrincipal
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Maximum installment redemption, percent of original aggregate principal amount             35.00%frp_DebtInstrumentPrincipalRedemptionPercentageMaximum
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Notes, 8.75%, due 2019 | Notes Payable to Banks | Term Loan | After February 14, 2015, On or Prior to February 14, 2016              
Schedule of Available-for-sale Securities [Line Items]              
Principal payment on the term loan 1,600,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
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Redemption price 101.00%us-gaap_DebtInstrumentRedemptionPricePercentage
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Notes, 8.75%, due 2019 | Notes Payable to Banks | Term Loan | Beginning June 30, 2013              
Schedule of Available-for-sale Securities [Line Items]              
Mandatory repayments percentage 50.00%frp_DebtInstrumentMandatoryRepaymentsPercentageOfExcessCashFlow
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Notes, 8.75%, due 2019 | Notes Payable to Banks | Term Loan | Fiscal Periods Subsequent to June 30, 2013              
Schedule of Available-for-sale Securities [Line Items]              
Mandatory repayments percentage 25.00%frp_DebtInstrumentMandatoryRepaymentsPercentageOfExcessCashFlow
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Revolving Facility under the Credit Agreement              
Schedule of Available-for-sale Securities [Line Items]              
Percentage commitment fee on average daily unused portion of exit revolving facility       0.75%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
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Revolving Facility under the Credit Agreement | Years 1-3              
Schedule of Available-for-sale Securities [Line Items]              
Loan origination fees of Revolving Facility for future years       1,500,000us-gaap_DebtIssuanceCosts
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Revolving Facility under the Credit Agreement | Senior secured credit facility | Bank of America Syndicate              
Schedule of Available-for-sale Securities [Line Items]              
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