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Share-Based and Long-Term Compensation Plans (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Feb. 20, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 1,700,000us-gaap_AllocatedShareBasedCompensationExpense $ 2,500,000us-gaap_AllocatedShareBasedCompensationExpense    
Non-vested awards compensation expense not yet recognized 10,500,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized      
Non-vested awards compensation expense recognition period 2 years      
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted for stock options 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
     
Weighted average price per share outstanding (dollars per share) $ 4.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
    $ 4.17us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 267,596us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
     
Weighted average price per unit outstanding (dollars per share) $ 14.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
    $ 16.03us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
Profits Interest Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 147,302us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= pky_ProfitsInterestUnitsMember
     
Weighted average price per unit outstanding (dollars per share) $ 8.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pky_ProfitsInterestUnitsMember
    $ 9.26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pky_ProfitsInterestUnitsMember
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
     
Weighted average price per unit outstanding (dollars per share) $ 13.82us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
    $ 14.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Deferred Incentive Share Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= pky_DeferredIncentiveShareUnitsMember
     
Weighted average price per unit outstanding (dollars per share) $ 16.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pky_DeferredIncentiveShareUnitsMember
    $ 16.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pky_DeferredIncentiveShareUnitsMember
2015 Equity Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Additional shares authorized     2,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= pky_A2015OmnibusEquityIncentivePlanMember
 
2013 Equity Plan | Profits Interest Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 447,938us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= pky_ProfitsInterestUnitsMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
     
Value of units outstanding 3,800,000pky_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingValue
/ us-gaap_AwardTypeAxis
= pky_ProfitsInterestUnitsMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
     
Weighted average price per unit outstanding (dollars per share) $ 8.58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pky_ProfitsInterestUnitsMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
     
2010 Equity Plan | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 4 years      
Number of units granted (in shares) 5,426us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pky_A2010EquityPlanMember
     
Value of units outstanding 75,000pky_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pky_A2010EquityPlanMember
     
Weighted average price per unit outstanding (dollars per share) $ 13.82us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= pky_A2010EquityPlanMember
     
2010 Equity Plan | Deferred Incentive Share Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 4 years      
Number of units granted (in shares) 6,570us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= pky_DeferredIncentiveShareUnitsMember
/ us-gaap_PlanNameAxis
= pky_A2010EquityPlanMember
     
Value of units outstanding 109,000pky_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingValue
/ us-gaap_AwardTypeAxis
= pky_DeferredIncentiveShareUnitsMember
/ us-gaap_PlanNameAxis
= pky_A2010EquityPlanMember
     
Weighted average price per unit outstanding (dollars per share) $ 16.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pky_DeferredIncentiveShareUnitsMember
/ us-gaap_PlanNameAxis
= pky_A2010EquityPlanMember
     
25% per Year in the First Four Years | 2013 Equity Plan | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted for stock options 1,850,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Award vesting rights (in percent) 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Number of options vested (in shares) 431,250us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Number of options remain unvested (in shares) 862,500us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Value of shares outstanding for stock options 3,600,000pky_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsOutstandingValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Weighted average price per share outstanding (dollars per share) $ 4.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
25% per Year in the First Four Years | 2013 Equity Plan | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 483,182us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Value of units outstanding 8,800,000pky_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Weighted average price per unit outstanding (dollars per share) $ 18.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_A25perYearintheFirstFourYearsMember
     
Performance | 2013 Equity Plan | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares) 233,528us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_PerformanceMember
     
Value of units outstanding $ 1,900,000pky_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_PerformanceMember
     
Weighted average price per unit outstanding (dollars per share) $ 8.15us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= pky_A2013EquityPlanMember
/ us-gaap_VestingAxis
= pky_PerformanceMember
     
Minimum | 2013 Equity Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 3 years      
Minimum | Performance | 2013 Equity Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 1 year