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Commitments And Contingencies (Schedule Of Real Estate Property) (Details) (USD $)
0 Months Ended
Feb. 11, 2015
sqft
Dec. 31, 2014
sqft
property
Real Estate Properties [Line Items]    
Number of buildings 11us-gaap_NumberOfRealEstateProperties 126us-gaap_NumberOfRealEstateProperties
Area of real estate property 641,593us-gaap_AreaOfRealEstateProperty 9,300,000us-gaap_AreaOfRealEstateProperty
Purchase Price $ 77,726,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings  
Assumed Debt 4,837,000trno_DebtAssumedOnProperties  
Unfunded Capital Commitments [Member]    
Real Estate Properties [Line Items]    
Area of real estate property 413,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_FairValueByLiabilityClassAxis
= trno_UnfundedCapitalCommitmentsMember
 
Unfunded capital commitments 700,000trno_UnfundedCapitalCommitments
/ us-gaap_FairValueByLiabilityClassAxis
= trno_UnfundedCapitalCommitmentsMember
 
Increase in area of real estate property 190,000trno_IncreaseInAreaOfRealEstateProperty
/ us-gaap_FairValueByLiabilityClassAxis
= trno_UnfundedCapitalCommitmentsMember
 
Northern New Jersey/New York City [Member]    
Real Estate Properties [Line Items]    
Purchase Price 9,416,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
/ us-gaap_StatementGeographicalAxis
= trno_NorthernNewJerseyAndNewYorkMember
 
San Francisco Bay Area [Member]    
Real Estate Properties [Line Items]    
Number of buildings 4us-gaap_NumberOfRealEstateProperties
/ us-gaap_StatementGeographicalAxis
= trno_SanFranciscoBayAreaMember
 
Area of real estate property 300,620us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= trno_SanFranciscoBayAreaMember
 
Purchase Price 37,200,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
/ us-gaap_StatementGeographicalAxis
= trno_SanFranciscoBayAreaMember
 
Seattle [Member]    
Real Estate Properties [Line Items]    
Number of buildings 4us-gaap_NumberOfRealEstateProperties
/ us-gaap_StatementGeographicalAxis
= trno_SeattleMember
 
Area of real estate property 138,154us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= trno_SeattleMember
 
Purchase Price 12,250,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
/ us-gaap_StatementGeographicalAxis
= trno_SeattleMember
 
Assumed Debt 4,837,000trno_DebtAssumedOnProperties
/ us-gaap_StatementGeographicalAxis
= trno_SeattleMember
 
Miami [Member]    
Real Estate Properties [Line Items]    
Number of buildings 2us-gaap_NumberOfRealEstateProperties
/ us-gaap_StatementGeographicalAxis
= trno_MiamiMember
 
Area of real estate property 87,532us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= trno_MiamiMember
 
Purchase Price 8,500,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
/ us-gaap_StatementGeographicalAxis
= trno_MiamiMember
 
Washington DC and Baltimore [Member]    
Real Estate Properties [Line Items]    
Number of buildings 1us-gaap_NumberOfRealEstateProperties
/ us-gaap_StatementGeographicalAxis
= trno_WashingtonDcAndBaltimoreMember
1us-gaap_NumberOfRealEstateProperties
/ us-gaap_StatementGeographicalAxis
= trno_WashingtonDcAndBaltimoreMember
Area of real estate property 115,287us-gaap_AreaOfRealEstateProperty
/ us-gaap_StatementGeographicalAxis
= trno_WashingtonDcAndBaltimoreMember
 
Purchase Price $ 10,360,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
/ us-gaap_StatementGeographicalAxis
= trno_WashingtonDcAndBaltimoreMember
 
Improved Land Parcel [Member] | Northern New Jersey/New York City [Member]    
Real Estate Properties [Line Items]    
Area of real estate property 4.5us-gaap_AreaOfRealEstateProperty
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= trno_ImprovedLandParcelMember
/ us-gaap_StatementGeographicalAxis
= trno_NorthernNewJerseyAndNewYorkMember