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Significant Accounting Policies (Details)	6 Months Ended
	Jun. 30, 2012
Land [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Standard Depreciable Life	Not depreciated
Building [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Building Improvements	40 years
Building and improvements [Member] | Minimum [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Building Improvements	5 years
Building and improvements [Member] | Maximum [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Building Improvements	40 years
In-Place Leases [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Standard Depreciable Life	Lease term
Tenant Improvements [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Standard Depreciable Life	Shorter of lease term or useful life
Leasing Costs [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Standard Depreciable Life	Lease term
Above/Below Market Leases [Member]
Schedule of depreciation and amortization on the estimated useful life of assets or liabilities
Standard Depreciable Life	Lease term

X

- Definition

Property plant and equipment useful life description.

+ References

No definition available.

+ Details

Name:	trno_PropertyPlantAndEquipmentUsefulLifeDescription
Namespace Prefix:	trno_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	trno_PropertyPlantEquipmentAndIntangibleAssetsDescriptionAbstract
Namespace Prefix:	trno_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration