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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Aug. 05, 2014
Omnifrio Single-Serve Beverage Business [Member]      
Omnifrio Single-Serve Beverage Business [Abstract]      
Deferred purchase price payments $ 1,976prmw_DeferredPurchasePricePaymentsIncludedWithinCurrentLiabilitiesOfDisposalGroupHeldForSale
/ us-gaap_BusinessAcquisitionAxis
= prmw_OmnifrioSingleServeBeverageBusinessMember		 $ 1,987prmw_DeferredPurchasePricePaymentsIncludedWithinCurrentLiabilitiesOfDisposalGroupHeldForSale
/ us-gaap_BusinessAcquisitionAxis
= prmw_OmnifrioSingleServeBeverageBusinessMember		  
Prism Arbitration [Member] | Maximum [Member]      
Omnifrio Single-Serve Beverage Business [Abstract]      
Arbitration damaged claim value     $ 1,000prmw_LossContingencyDamagesClaimValue
/ us-gaap_BusinessAcquisitionAxis
= prmw_PrismArbitrationMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember