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Other Intangible Assets Textuals Finite and Indefinite-Lived (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items]      
Amortization of Intangible Assets $ 11.0us-gaap_AmortizationOfIntangibleAssets $ 11.1us-gaap_AmortizationOfIntangibleAssets $ 11.2us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]      
2015 11.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
2016 11.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
2017 11.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
2018 11.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
2019 11.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Trade Names      
ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems [Line Items]      
Indefinite LIved Intangible Assets, Gross (Excluding Goodwill) $ 39.2frp_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
$ 39.2frp_IndefiniteLivedIntangibleAssetsGrossExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember