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Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2012
Accounting Policies [Abstract]      
Financial Effect of Change in Accounting Estimate   $ 0.08vprt_FinancialEffectOfChangeInAccountingEstimate  
Reconciliation of weighted-average number of ordinary shares      
Weighted average shares outstanding, basic 32,873,234us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 33,209,172us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 37,813,504us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average shares issuable upon exercise/vesting of outstanding share options/RSUs/RSAs 1,366,675us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 1,262,832us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 1,139,675us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Shares used in computing diluted net income per share 34,239,909us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 34,472,004us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 38,953,179us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Weighted average anti-dilutive shares excluded from diluted net income per share 953,100us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1,740,542us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1,495,858us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Other Income and Expenses [Abstract]      
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (7,473,000)us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet 29,000us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet 0us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Foreign Currency Transaction Gain (Loss), Realized (1,476,000)us-gaap_ForeignCurrencyTransactionGainLossRealized (92,000)us-gaap_ForeignCurrencyTransactionGainLossRealized 2,350,000us-gaap_ForeignCurrencyTransactionGainLossRealized
Equity Method Investment, Realized Gain (Loss) on Disposal (12,681,000)us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal 0us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal 0us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Other income (expense), net $ (21,630,000)us-gaap_OtherNonoperatingIncomeExpense $ (63,000)us-gaap_OtherNonoperatingIncomeExpense $ 2,350,000us-gaap_OtherNonoperatingIncomeExpense