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Fair Value of Assets and Liabilities (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Travel Centers of America LLC  
Fair Value of Assets and Liabilities  
Shares included in investment securities 3,420,000us-gaap_InvestmentOwnedBalanceShares
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hpt_TravelCentersOfAmericaMember
Quoted Prices in Active Markets for Identical Assets (Level 1) | Travel Centers of America LLC  
Fair Value of Assets and Liabilities  
Shares included in investment securities 3,420,000us-gaap_InvestmentOwnedBalanceShares
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hpt_TravelCentersOfAmericaMember
Historical cost of securities 17,407us-gaap_InvestmentOwnedAtCost
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= hpt_TravelCentersOfAmericaMember
Recurring | Fair Value  
Fair Value of Assets and Liabilities  
Investment securities 59,645us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)  
Fair Value of Assets and Liabilities  
Investment securities 59,645us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember