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COMMITMENTS AND CONTINGENCIES (Details) (USD $)
1 Months Ended
Jul. 31, 2014
Mar. 31, 2014
installment
Dec. 31, 2014
Gain Contingencies [Line Items]      
Unconditional purchase obligations     $ 132,400,000us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Insurance settlement received 2,200,000us-gaap_InsuranceRecoveries    
Aliph, Inc and AliphCom, Inc. [Member]      
Gain Contingencies [Line Items]      
Litigation settlement payment, amount   8,000,000us-gaap_LitigationSettlementAmount
/ us-gaap_LitigationCaseAxis
= plt_AliphIncandAliphComInc.Member
 
Number of litigation payment installments   4plt_LitigationSettlementNumberofPaymentInstallments
/ us-gaap_LitigationCaseAxis
= plt_AliphIncandAliphComInc.Member
 
Litigation settlement, amount of each installment   $ 2,000,000plt_LitigationSettlementFuturePaymentAmount
/ us-gaap_LitigationCaseAxis
= plt_AliphIncandAliphComInc.Member