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Indebtedness (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
May 06, 2015
Indebtedness        
Unsecured revolving credit facility $ 89,000us-gaap_LineOfCredit   $ 18,000us-gaap_LineOfCredit  
Convertible senior unsecured notes 8,478us-gaap_ConvertibleDebt   8,478us-gaap_ConvertibleDebt  
Unsecured revolving credit facility        
Indebtedness        
Unsecured revolving credit facility 89,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
     
Unsecured revolving credit facility maximum borrowing capicity 750,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
     
Extendable term of credit facility 1 year      
Debt instrument, interest rate description LIBOR      
Margin over base rate, in basis points (as a percent) 1.10%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
     
Interest rate payable for facility fees (as a percent) 0.20%hpt_InterestRatePayableForFacilityFees
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
     
Interest rate (as a percent) 1.28%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
     
Weighted average interest rate for borrowings (as a percent) 1.27%hpt_DebtInstrumentWeightedAverageInterestRate
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
1.25%hpt_DebtInstrumentWeightedAverageInterestRate
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
   
Unsecured revolving credit facility | Subsequent event        
Indebtedness        
Unsecured revolving credit facility       44,000us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Unsecured term loan        
Indebtedness        
Unsecured term loan outstanding 400,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CreditFacilityAxis
= us-gaap_UnsecuredDebtMember
     
Debt instrument, interest rate description LIBOR      
Margin over base rate, in basis points (as a percent) 1.20%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_UnsecuredDebtMember
     
Interest rate (as a percent) 1.37%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_UnsecuredDebtMember
     
Weighted average interest rate for borrowings (as a percent) 1.37%hpt_DebtInstrumentWeightedAverageInterestRate
/ us-gaap_CreditFacilityAxis
= us-gaap_UnsecuredDebtMember
1.38%hpt_DebtInstrumentWeightedAverageInterestRate
/ us-gaap_CreditFacilityAxis
= us-gaap_UnsecuredDebtMember
   
Unsecured senior notes        
Indebtedness        
Unsecured senior notes 2,425,000hpt_UnsecuredSeniorNotesTotal
/ us-gaap_CreditFacilityAxis
= hpt_UnsecuredSeniorNotesMember
     
Revolving credit facility and term loan        
Indebtedness        
Maximum borrowing capacity that may be increased 2,300,000hpt_DebtInstrumentMaximumBorrowingCapacityOptionToIncrease
/ us-gaap_CreditFacilityAxis
= hpt_UnsecuredRevolvingCreditFacilityAndTermLoanMember
     
Convertible Senior Notes, due 2027 at 3.8%        
Indebtedness        
Convertible senior unsecured notes $ 8,478us-gaap_ConvertibleDebt
/ us-gaap_DebtInstrumentAxis
= us-gaap_ConvertibleNotesPayableMember