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Derivatives Instruments Narrative (Details) (Providência Contracts, Undesignated hedges, Foreign Currency and Other, Net, USD $)
In Millions, unless otherwise specified
 0 Months Ended 3 Months Ended
Jun. 11, 2014
Mar. 31, 2015
Foreign Exchange Forward [Member]
    
Derivatives, Fair Value [Line Items]    
Gain on Derivative Instruments, Pretax $ 18.9us-gaap_GainOnDerivativeInstrumentsPretax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= pymr_ForeignCurrencyAndOtherLossNetMember
/ us-gaap_ProductOrServiceAxis
= pymr_ProvidnciaContractsMember		  
Other Contract [Member] | Minimum
    
Derivatives, Fair Value [Line Items]    
Derivative, Term of Contract   1 year
Other Contract [Member] | Maximum
    
Derivatives, Fair Value [Line Items]    
Derivative, Term of Contract   5 years