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Investment in Real Estate - Purchase Price Allocation for Acquisition (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 06, 2014
Feb. 12, 2014
Feb. 28, 2014
Oct. 17, 2014
May 22, 2013
Jun. 14, 2013
Jul. 31, 2013
Sep. 26, 2013
Apr. 05, 2012
Jun. 02, 2012
Sep. 05, 2012
Sep. 21, 2012
Nov. 08, 2012
Consideration paid                                
Cash consideration $ 113,580,000us-gaap_PaymentsToAcquireBusinessesGross $ 389,883,000us-gaap_PaymentsToAcquireBusinessesGross $ 392,320,000us-gaap_PaymentsToAcquireBusinessesGross                          
Notes Receivable   4,000,000hpp_BusinessCombinationsCostofAcquiredNotesReceivable                            
Debt Assumed 0us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred 102,299,000us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred 0us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred                          
Non-controlling interest in consolidated real estate entity 0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion 45,704,000hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion 1,481,000hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion                          
Total consideration 113,580,000us-gaap_BusinessCombinationConsiderationTransferred1 541,886,000us-gaap_BusinessCombinationConsiderationTransferred1 393,801,000us-gaap_BusinessCombinationConsiderationTransferred1                          
Allocation of consideration paid                                
Investment in real estate, net 114,008,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet 538,322,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet 390,370,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet                          
Above-market leases 173,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases   167,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases                          
Deferred leasing costs and lease intangibles, net 3,163,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles 34,256,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles                            
Leases in place     16,099,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLeasesinPlace                          
Other lease intangibles     4,072,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLeaseIntangibles                          
Fair market unfavorable debt value   (5,820,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairMarketUnfavorableDebtValue                            
Below-market leases (3,315,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases (22,449,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases (16,018,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases                          
Other (liabilities) asset assumed, net (449,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet (2,423,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet (889,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet                          
Total consideration paid 113,580,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet 541,886,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet 393,801,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet                          
EOP Northern California Portfolio                                
Consideration paid                                
Cash consideration       1,750,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_EOPNorthernCaliforniaPortfolioMember
                       
Allocation of consideration paid                                
Area of real estate property       8,200,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= hpp_EOPNorthernCaliforniaPortfolioMember
                       
Equity consideration       63,474,791us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
/ us-gaap_BusinessAcquisitionAxis
= hpp_EOPNorthernCaliforniaPortfolioMember
                       
Merrill Place                                
Consideration paid                                
Cash consideration         57,034,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Total consideration         57,034,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Allocation of consideration paid                                
Investment in real estate, net         57,508,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Above-market leases         173,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Deferred leasing costs and lease intangibles, net         3,163,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Below-market leases         (3,315,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Other (liabilities) asset assumed, net         (495,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
Total consideration paid         57,034,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_MerrillPlaceMember
                     
3402 Pico Blvd.                                
Consideration paid                                
Cash consideration           18,546,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Total consideration           18,546,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Allocation of consideration paid                                
Investment in real estate, net           18,500,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Above-market leases           0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Deferred leasing costs and lease intangibles, net           0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Below-market leases           0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Other (liabilities) asset assumed, net           46,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
Total consideration paid           18,546,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_SantaMonica3402PicoBoulevardMember
                   
12655 Jefferson                                
Consideration paid                                
Cash consideration             38,000,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Total consideration             38,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Allocation of consideration paid                                
Investment in real estate, net             38,000,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Above-market leases             0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Deferred leasing costs and lease intangibles, net             0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Below-market leases             0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Other (liabilities) asset assumed, net             0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
Total consideration paid             38,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_A12655JeffersonMember
                 
3401 Exposition                                
Consideration paid                                
Cash consideration               8,489,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Notes Receivable               4,000,000hpp_BusinessCombinationsCostofAcquiredNotesReceivable
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Debt Assumed               13,233,000us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Non-controlling interest in consolidated real estate entity               0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Total consideration               25,722,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Allocation of consideration paid                                
Investment in real estate, net               25,439,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Deferred leasing costs and lease intangibles, net               0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Fair market unfavorable debt value               0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairMarketUnfavorableDebtValue
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Below-market leases               0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Other (liabilities) asset assumed, net               283,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Total consideration paid               25,722,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location3401ExpositionMember
               
Pinnacle II                                
Consideration paid                                
Cash consideration                 1,505,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Notes Receivable                 0hpp_BusinessCombinationsCostofAcquiredNotesReceivable
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Debt Assumed                 89,066,000us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Non-controlling interest in consolidated real estate entity                 45,704,000hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Total consideration                 136,275,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Allocation of consideration paid                                
Investment in real estate, net                 134,289,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Deferred leasing costs and lease intangibles, net                 12,637,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Fair market unfavorable debt value                 (5,820,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairMarketUnfavorableDebtValue
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Below-market leases                 (7,783,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Other (liabilities) asset assumed, net                 2,952,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Total consideration paid                 136,275,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIIMember
             
Seattle Portfolio                                
Consideration paid                                
Cash consideration                   368,389,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Notes Receivable                   0hpp_BusinessCombinationsCostofAcquiredNotesReceivable
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Debt Assumed                   0us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Non-controlling interest in consolidated real estate entity                   0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Total consideration                   368,389,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Allocation of consideration paid                                
Investment in real estate, net                   367,094,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Deferred leasing costs and lease intangibles, net                   21,619,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Fair market unfavorable debt value                   0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairMarketUnfavorableDebtValue
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Below-market leases                   (14,666,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Other (liabilities) asset assumed, net                   (5,658,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
Total consideration paid                   368,389,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_SeattleAcquisitionMember
           
1861 Bundy                                
Consideration paid                                
Cash consideration                     11,500,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Notes Receivable                     0hpp_BusinessCombinationsCostofAcquiredNotesReceivable
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Debt Assumed                     0us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Non-controlling interest in consolidated real estate entity                     0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Total consideration                     11,500,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Allocation of consideration paid                                
Investment in real estate, net                     11,500,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Deferred leasing costs and lease intangibles, net                     0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredLeasingCostsandLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Fair market unfavorable debt value                     0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedFairMarketUnfavorableDebtValue
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Below-market leases                     0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Other (liabilities) asset assumed, net                     0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
Total consideration paid                     11,500,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1861BundyMember
         
10900 Washington                                
Consideration paid                                
Cash consideration                       2,605,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Non-controlling interest in consolidated real estate entity                       0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Total consideration                       2,605,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Allocation of consideration paid                                
Investment in real estate, net                       2,600,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Above-market leases                       0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Leases in place                       0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLeasesinPlace
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Other lease intangibles                       0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Below-market leases                       0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Other (liabilities) asset assumed, net                       5,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
Total consideration paid                       2,605,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location10900WashingtonMember
       
901 Market                                
Consideration paid                                
Cash consideration                         90,871,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Non-controlling interest in consolidated real estate entity                         0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Total consideration                         90,871,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Allocation of consideration paid                                
Investment in real estate, net                         97,187,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Above-market leases                         0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Leases in place                         2,968,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLeasesinPlace
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Other lease intangibles                         548,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Below-market leases                         (10,249,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Other (liabilities) asset assumed, net                         417,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Total consideration paid                         90,871,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location901MarketMember
     
Element LA                                
Consideration paid                                
Cash consideration                           88,436,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Non-controlling interest in consolidated real estate entity                           0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Total consideration                           88,436,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Allocation of consideration paid                                
Investment in real estate, net                           88,024,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Above-market leases                           0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Leases in place                           1,325,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLeasesinPlace
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Other lease intangibles                           46,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Below-market leases                           (666,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Other (liabilities) asset assumed, net                           (293,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
Total consideration paid                           88,436,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_OlympicBundyMember
   
1455 Gordon Street                                
Consideration paid                                
Cash consideration                             2,385,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Non-controlling interest in consolidated real estate entity                             0hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Total consideration                             2,385,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Allocation of consideration paid                                
Investment in real estate, net                             2,384,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Above-market leases                             0hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Leases in place                             96,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLeasesinPlace
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Other lease intangibles                             22,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Below-market leases                             (27,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Other (liabilities) asset assumed, net                             (90,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Total consideration paid                             2,385,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_Location1455GordanStMember
 
Pinnacle I                                
Consideration paid                                
Cash consideration                               208,023,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Non-controlling interest in consolidated real estate entity                               1,481,000hpp_BusinessAcquisitionCostOfAcquiredEntityNonControllingInterestPortion
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Total consideration                               209,504,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Allocation of consideration paid                                
Investment in real estate, net                               200,175,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRealEstateInvestmentPropertyNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Above-market leases                               167,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAbovemarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Leases in place                               11,710,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLeasesinPlace
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Other lease intangibles                               3,456,000hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLeaseIntangibles
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Below-market leases                               (5,076,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBelowmarketLeases
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Other (liabilities) asset assumed, net                               (928,000)hpp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Total consideration paid                               $ 209,504,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= hpp_PinnacleIMember
Office Building | EOP Northern California Portfolio                                
Allocation of consideration paid                                
Number of properties acquired       26us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= hpp_EOPNorthernCaliforniaPortfolioMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OfficeBuildingMember
                       
Development Parcel [Member] | EOP Northern California Portfolio                                
Allocation of consideration paid                                
Number of properties acquired       2us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= hpp_EOPNorthernCaliforniaPortfolioMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= hpp_DevelopmentParcelMember