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Significant Accounting Policies (Schedule Of Intangible Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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In-Place Leases [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | $ 50,134 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember | $ 39,413 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember
Accumulated Amortization | (20,412)us-gaap_RealEstateAccumulatedDepreciation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember | (17,154)us-gaap_RealEstateAccumulatedDepreciation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember
Net | 29,722 trno_SecScheduleIiiRealEstateInvestmentPropertyNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember | 22,259 trno_SecScheduleIiiRealEstateInvestmentPropertyNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMember
Above-Market Leases [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | 4,332 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember | 4,079 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember
Accumulated Amortization | (2,771)us-gaap_RealEstateAccumulatedDepreciation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember | (2,596)us-gaap_RealEstateAccumulatedDepreciation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember
Net | 1,561 trno_SecScheduleIiiRealEstateInvestmentPropertyNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember | 1,483 trno_SecScheduleIiiRealEstateInvestmentPropertyNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember
Below-Market Leases [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | (9,627)us-gaap_RealEstateGrossAtCarryingValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = trno_BelowMarketLeaseMember | (7,188)us-gaap_RealEstateGrossAtCarryingValue / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = trno_BelowMarketLeaseMember
Accumulated Amortization | 4,388 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = trno_BelowMarketLeaseMember | 3,632 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = trno_BelowMarketLeaseMember
Net | $ (5,239)trno_SecScheduleIiiRealEstateInvestmentPropertyNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = trno_BelowMarketLeaseMember | $ (3,556)trno_SecScheduleIiiRealEstateInvestmentPropertyNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = trno_BelowMarketLeaseMember

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- Definition Amount after accumulated depreciation of real estate held for investment for entities with a substantial portion of business acquiring and holding investment real estate. + References No definition available. + Details
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- Definition Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.FN4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 + Details
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- Definition Amount, before accumulated depreciation, of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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