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Fair Value Measurements Unobservable Inputs (Details) (ClinIntel Acquisition [Member])
 9 Months Ended
Mar. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Discount Rate 4.00%us-gaap_FairValueInputsDiscountRate
Minimum [Member]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Probability of Achieving Financial Target 12.50%prxl_FairValueInputsProbabilityofAchievingFinancialTarget
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Fair Value Inputs, Probability of Achieving Financial Target 75.00%prxl_FairValueInputsProbabilityofAchievingFinancialTarget
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember