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Related Party Transactions (Details) (Monitoring Fee, TPG VI Management, LLC, Management Service Agreement, USD $)
In Thousands, unless otherwise specified
0 Months Ended
Mar. 25, 2015
Monitoring Fee | TPG VI Management, LLC | Management Service Agreement
 
Related Party Transaction [Line Items]  
Payment of management fee $ 250us-gaap_PaymentForManagementFee
/ us-gaap_NatureOfExpenseAxis
= pky_MonitoringFeeMember
/ us-gaap_RelatedPartyTransactionAxis
= pky_ManagementServiceAgreementMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pky_TPGVIManagementLLCMember