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Investments In Real Estate (Narrative) (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Finite Lived Intangible Assets [Line Items] |  |
Recorded revenues | $ 23,131,000 us-gaap_RealEstateRevenueNet | $ 15,804,000 us-gaap_RealEstateRevenueNet
2015 Acquisition [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Number of buildings | 11 trno_NumberOfRealEstateBuildingsAcquired / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Area of real estate property | 1,196,322 trno_AreaOfRealEstatePropertyAcquired / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Total aggregate initial investment | 154,100,000 us-gaap_BusinessCombinationConsiderationTransferred1 / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Land | 80,500,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Buildings and improvements | 62,600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Intangible assets | 11,000,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Intangible liabilities | 2,400,000 us-gaap_BelowMarketLeaseAcquired / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Recorded revenues | 1,800,000 us-gaap_RealEstateRevenueNet / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
Recorded net income | 100,000 us-gaap_NetInvestmentIncome / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFifteenAcquisitionMember |
2014 Acquisition [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Number of buildings |  | 3 trno_NumberOfRealEstateBuildingsAcquired / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Area of real estate property |  | 318,822 trno_AreaOfRealEstatePropertyAcquired / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Total aggregate initial investment |  | 33,900,000 us-gaap_BusinessCombinationConsiderationTransferred1 / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Land |  | 11,500,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Buildings and improvements |  | 20,300,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Intangible assets |  | 2,100,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Intangible liabilities |  | 300,000 us-gaap_BelowMarketLeaseAcquired / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Recorded revenues |  | 100,000 us-gaap_RealEstateRevenueNet / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Recorded net income |  | 16,000 us-gaap_NetInvestmentIncome / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Assumption of mortgage loan, total principal |  | $ 2,800,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Fixed interest rate |  | 5.09%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / trno_AcquisitionActivityByTypeAxis = trno_TwoThousandFourteenAcquisitionMember
Maturity date |  | Aug. 01, 2015

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- Definition Area of real estate property acquired, during period. + References No definition available. + Details
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- Definition Number of real estate buildings acquired, during period. + References No definition available. + Details
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- Definition Amount of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life. + References No definition available. + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 + Details
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- Definition Amount of real estate acquired, at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 2 -Article 7 + Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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