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Commitments And Contingencies (Guarantees) (Details) (SunBelt, USD $)
In Millions, unless otherwise specified
 1 Months Ended
Feb. 28, 2011
Dec. 31, 2014
SunBelt
    
Commitments And Related-Party Information [Line Items]    
Percentage of equity interest sold 50.00%us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pol_SunbeltMember		  
Cash received from equity interest sold $ 132.3us-gaap_SaleOfStockConsiderationReceivedOnTransaction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pol_SunbeltMember		  
Aggregate principal amount of senior secured notes 42.7us-gaap_NetAmountAtRiskByProductAndGuaranteeGeneralAccountValue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pol_SunbeltMember		  
Aggregate principal amount of senior secured notes   $ 18.3pol_DebtInstrumentGuaranteeAssumedByAcquirer
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pol_SunbeltMember