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Stockholder's Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock, shares authorized | 400,000,000 us-gaap_CommonStockSharesAuthorized |  | 400,000,000 us-gaap_CommonStockSharesAuthorized
Common stock, par value | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare
Preferred stock, shares | 100,000,000 us-gaap_PreferredStockSharesAuthorized |  | 100,000,000 us-gaap_PreferredStockSharesAuthorized
Preferred stock, par value | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare |  | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares issued | 1,840,000 us-gaap_PreferredStockSharesIssued |  | 1,840,000 us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding | 1,840,000 us-gaap_PreferredStockSharesOutstanding |  | 1,840,000 us-gaap_PreferredStockSharesOutstanding
Series A Preferred Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Type of preferred stock completed public offering | 7.75% Series A Cumulative Redeemable Preferred Stock |  |
Dividend rate | 7.75%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
Redemption date of Series A Preferred Stock | Jul. 19, 2017 |  |
Redemption price of Series A Preferred Stock | $ 25.00 us-gaap_PreferredStockRedemptionPricePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  |
LTIP [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation costs | $ 1.4 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = trno_LongTermIncentivePlanMember | $ 0.3 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = trno_LongTermIncentivePlanMember |
Accrued compensation costs | 3.3 trno_AccruedCompensationCosts / us-gaap_PlanNameAxis = trno_LongTermIncentivePlanMember |  | 1.9 trno_AccruedCompensationCosts / us-gaap_PlanNameAxis = trno_LongTermIncentivePlanMember
2010 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock, shares authorized | 1,705,000 us-gaap_CommonStockSharesAuthorized / us-gaap_PlanNameAxis = trno_TwoThousandTenEquityIncentivePlanMember |  |
Remaining balance of shares available | 1,279,183 trno_CommonStockSharesAuthorizedRemaining / us-gaap_PlanNameAxis = trno_TwoThousandTenEquityIncentivePlanMember |  |
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, weighted average grant date fair value | $ 23.39 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |
Fair value of the restricted stock granted | 0.6 trno_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |
Vesting period for the restricted stock | 5 years |  |
Total unrecognized compensation costs related to restricted stock issuances | 2.2 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |
Remaining weighted average period | 3 years 7 months 6 days |  |
Compensation costs | 0.2 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 0.2 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |
Restricted Stock [Member] | 2010 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Initial public offering price | $ 20.00 trno_InitialPublicOfferingPrice / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = trno_TwoThousandTenEquityIncentivePlanMember |  |
Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock aggregate offering price | $ 100.0 trno_CommonStockAggregateOfferingPrice / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Maximum [Member] | 2010 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, weighted average grant date fair value | $ 23.39 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = trno_TwoThousandTenEquityIncentivePlanMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Minimum [Member] | 2010 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, weighted average grant date fair value | $ 14.20 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_PlanNameAxis = trno_TwoThousandTenEquityIncentivePlanMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |

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