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FOREIGN CURRENCY DERIVATIVES (Details)
In Thousands, unless otherwise specified
9 Months Ended 9 Months Ended
Dec. 31, 2014
Foreign Exchange Forward, EURO [Member]
USD ($)
Dec. 31, 2014
Foreign Exchange Forward, EURO [Member]
EUR (€)
Dec. 31, 2014
Foreign Exchange Forward, GBP [Member]
USD ($)
Dec. 31, 2014
Foreign Exchange Forward, GBP [Member]
GBP (£)
Dec. 31, 2014
Foreign Exchange Forward, AUD [Member]
USD ($)
Dec. 31, 2014
Foreign Exchange Forward, AUD [Member]
AUD
Dec. 31, 2014
Foreign Exchange Option [Member]
Dec. 31, 2014
Foreign exchange option, EURO [Member]
EUR (€)
Mar. 31, 2014
Foreign exchange option, EURO [Member]
EUR (€)
Dec. 31, 2014
Foreign exchange option, GBP [Member]
GBP (£)
Mar. 31, 2014
Foreign exchange option, GBP [Member]
GBP (£)
Dec. 31, 2014
Foreign currency swap contract [Member]
USD ($)
Dec. 31, 2014
Foreign currency swap contract [Member]
MXN
Mar. 31, 2014
Foreign currency swap contract [Member]
MXN
Dec. 31, 2014
Other current assets [Member]
USD ($)
Mar. 31, 2014
Other current assets [Member]
USD ($)
Dec. 31, 2014
Other current assets [Member]
Non-designated hedges [Member]
USD ($)
Mar. 31, 2014
Other current assets [Member]
Non-designated hedges [Member]
USD ($)
Dec. 31, 2014
Other current assets [Member]
Designated as hedging instrument [Member]
Cash flow hedges [Member]
USD ($)
Mar. 31, 2014
Other current assets [Member]
Designated as hedging instrument [Member]
Cash flow hedges [Member]
USD ($)
Dec. 31, 2014
Other accrued liabilities [Member]
USD ($)
Mar. 31, 2014
Other accrued liabilities [Member]
USD ($)
Dec. 31, 2014
Other accrued liabilities [Member]
Non-designated hedges [Member]
USD ($)
Mar. 31, 2014
Other accrued liabilities [Member]
Non-designated hedges [Member]
USD ($)
Dec. 31, 2014
Other accrued liabilities [Member]
Designated as hedging instrument [Member]
Cash flow hedges [Member]
USD ($)
Mar. 31, 2014
Other accrued liabilities [Member]
Designated as hedging instrument [Member]
Cash flow hedges [Member]
USD ($)
Derivative [Line Items]                                                    
Derivative assets                             $ 7,299us-gaap_DerivativeAssetsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
$ 1,126us-gaap_DerivativeAssetsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
$ 1,019us-gaap_DerivativeAssetsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
$ 153us-gaap_DerivativeAssetsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
$ 6,280us-gaap_DerivativeAssetsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
$ 973us-gaap_DerivativeAssetsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
           
Derivative liabilities                                         3,618us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
2,884us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
1us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
80us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
3,617us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
2,804us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Notional amount of contracts $ 35,824invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignExchangeForwardEuroMember
€ 29,400invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignExchangeForwardEuroMember
$ 12,408invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignExchangeForwardGbpMember
£ 8,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignExchangeForwardGbpMember
$ 5,982invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignExchangeForwardAudMember
7,400invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignExchangeForwardAudMember
  € 64,600invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignexchangeoptionEUROMember
€ 55,700invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignexchangeoptionEUROMember
£ 28,900invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignexchangeoptionGBPMember
£ 23,900invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignexchangeoptionGBPMember
$ 38,334invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignCurrencySwapContractMember
525,120invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignCurrencySwapContractMember
204,600invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= plt_ForeignCurrencySwapContractMember
                       
Position Sell EUR Sell EUR Sell GBP Sell GBP Sell AUD Sell AUD                                        
Maturity 1 month 1 month 1 month 1 month 1 month 1 month           17 months 17 months                          
Derivative terms             1 year                                      
Position                       Buy MXN Buy MXN