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Fair Value Measurements (Schedule Of Fair Value Hierarchy, Assets (Liabilities) Carried At Fair Value) (Details) (USD $)
9 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended
Mar. 31, 2015
Jun. 30, 2013
Oct. 03, 2014
Mar. 31, 2015
Jun. 30, 2014
May 01, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value 9,218,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue     $ 9,218,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue $ 5,152,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue  
Long-term Debt, Fair Value 98,000,000us-gaap_LongTermDebtFairValue     98,000,000us-gaap_LongTermDebtFairValue    
Interest Rate Derivative Instruments 530,000us-gaap_InterestRateDerivativesAtFairValueNet     530,000us-gaap_InterestRateDerivativesAtFairValueNet 580,000us-gaap_InterestRateDerivativesAtFairValueNet  
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net (20,039,000)us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet     (20,039,000)us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet 6,463,000us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet  
Marketable Securities, Current 0us-gaap_MarketableSecuritiesCurrent     0us-gaap_MarketableSecuritiesCurrent 95,641,000us-gaap_MarketableSecuritiesCurrent  
Business Acquisition, Contingent Consideration, at Fair Value (9,218,000)us-gaap_BusinessCombinationContingentConsiderationLiability     (9,218,000)us-gaap_BusinessCombinationContingentConsiderationLiability (5,152,000)us-gaap_BusinessCombinationContingentConsiderationLiability  
Total (28,727,000)us-gaap_AssetsFairValueDisclosure     (28,727,000)us-gaap_AssetsFairValueDisclosure 1,891,000us-gaap_AssetsFairValueDisclosure  
Fair Value, Inputs, Level 1 [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Interest Rate Derivative Instruments 0us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
    0us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
0us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net 0us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
    0us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
0us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Business Acquisition, Contingent Consideration, at Fair Value 0us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
    0us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
0us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Total 0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
    0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
0us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
 
Fair Value, Inputs, Level 2 [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Interest Rate Derivative Instruments 530,000us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
    530,000us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
580,000us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
 
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net (20,039,000)us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
    (20,039,000)us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
6,463,000us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
 
Business Acquisition, Contingent Consideration, at Fair Value 0us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
    0us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
0us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
 
Total (19,509,000)us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
    (19,509,000)us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
7,043,000us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
 
Fair Value, Inputs, Level 3 [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Interest Rate Derivative Instruments 0us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
    0us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
0us-gaap_InterestRateDerivativesAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
 
Foreign Currency Fair Value Hedge Derivative at Fair Value, Net 0us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
    0us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
0us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
 
Business Acquisition, Contingent Consideration, at Fair Value (9,218,000)us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
    (9,218,000)us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
(5,152,000)us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
 
Total (9,218,000)us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
    (9,218,000)us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
(5,152,000)us-gaap_AssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
 
Minimum [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Marketable Securities Maturity Period 90 days          
Maximum [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Marketable Securities Maturity Period one year          
Heron Acquisition [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Payments to Acquire Businesses, Gross   22,800,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= prxl_HeronAcquisitionMember
       
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High           14,200,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= prxl_HeronAcquisitionMember
Business Acquisition, Contingent Consideration, at Fair Value           (5,900,000)us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= prxl_HeronAcquisitionMember
ClinIntel Acquisition [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Payments to Acquire Businesses, Gross 8,780,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
  8,774,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
     
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     16,200,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
     
Fair Value Inputs, Discount Rate 4.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
         
Business Acquisition, Contingent Consideration, at Fair Value     (9,882,000)us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= prxl_ClinIntelAcquisitionMember
     
Selling, General and Administrative Expenses [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings (4,964,000)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember
    $ 1,986,000us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_SellingGeneralAndAdministrativeExpensesMember