Stockholders' Equity Fiscal Year 2013 Share Repurchase Plan (Details)	3 Months Ended	9 Months Ended
Mar. 31, 2016	Mar. 31, 2017
PercentOfSharesReceivedUnderASR	80.00%	80.00%

Percent of initial number of shares received under accelerated share repurchase agreement.

No definition available.

Name:	prxl_PercentOfSharesReceivedUnderASR
Namespace Prefix:	prxl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration