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Equity - 8.375% Series B Cumulative Redeemable Preferred Stock Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 20, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Jan. 23, 2012 | Dec. 31, 2010
Class of Stock |  |  |  |  |
Proceeds from sale of common stock (in shares) | 11,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  |
Series B Preferred Stock |  |  |  |  |
Class of Stock |  |  |  |  |
Interest rate of preferred stock |  | 8.375%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 8.375%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Shares outstanding of preferred stock |  | 5,800,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | 5,800,000 us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Series B Cumulative Redeemable Preferred Stock, Liquidation Preference Per Share |  | $ 25 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | $ 25 us-gaap_PreferredStockLiquidationPreference / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Par value of preferred stock |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |
Liquidation preference of preferred stock, per annum (dollars per share) |  | $ 2.0938 hpp_PreferredStockLiquidationPreferencePerAnnumPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |
Preferred stock, redemption period after change in control |  | 90 days |  |  |
Change of Control | Series B Preferred Stock |  |  |  |  |
Class of Stock |  |  |  |  |
Interest rate of preferred stock |  | 12.375%us-gaap_PreferredStockDividendRatePercentage / hpp_LiquidationPreferenceAxis = hpp_ChangeOfControlMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |
Liquidation preference of preferred stock, per annum (dollars per share) |  | $ 3.09375 hpp_PreferredStockLiquidationPreferencePerAnnumPerShare / hpp_LiquidationPreferenceAxis = hpp_ChangeOfControlMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember |  |  |
Public Offering | Series B Preferred Stock |  |  |  |  |
Class of Stock |  |  |  |  |
Proceeds from sale of common stock (in shares) |  |  |  | 2,300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingMember | 3,500,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingMember
Proceeds from the offering before transaction costs |  |  |  | $ 57.5 hpp_ProceedsFromIssuanceOfRedeemablePreferredStockNetOfIssuanceCostsBeforeTransactionCosts1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingMember | $ 83.9 hpp_ProceedsFromIssuanceOfRedeemablePreferredStockNetOfIssuanceCostsBeforeTransactionCosts1 / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingMember
Public Offering, Exercise of Over-allotment Option |  |  |  |  |
Class of Stock |  |  |  |  |
Proceeds from sale of common stock (in shares) | 1,650,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember |  |  |  |
Public Offering, Exercise of Over-allotment Option | Series B Preferred Stock |  |  |  |  |
Class of Stock |  |  |  |  |
Proceeds from sale of common stock (in shares) |  |  |  | 300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember | 300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember / us-gaap_SubsidiarySaleOfStockAxis = hpp_PublicOfferingExerciseOfOverAllotmentOptionMember

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- Definition Preferred Stock, Liquidation Preference, Per Annum Per Share + References No definition available. + Details
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- Definition Preferred Stock, Redemption Period After Change in Control + References No definition available. + Details
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- Definition Proceeds from Issuance of Redeemable Preferred Stock, Net of Issuance Costs, Before Transaction Costs + References No definition available. + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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