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Concentration Of Credit Risk (Details)	3 Months Ended
	Mar. 31, 2015 customer sqft property
Real Estate Properties [Line Items]
Number of buildings	137us-gaap_NumberOfRealEstateProperties
Area of real estate property	10,400,000us-gaap_AreaOfRealEstateProperty
Number of tenants accounting for more than 10% of total revenues	0trno_NumberOfTenants
Maximum [Member]
Real Estate Properties [Line Items]
Total revenue percentage from largest customer	10.00%trno_RevenuePercentageFromLargestCustomer / us-gaap_RangeAxis = us-gaap_MaximumMember
Northern New Jersey/New York City [Member]
Real Estate Properties [Line Items]
Number of buildings	41us-gaap_NumberOfRealEstateProperties / us-gaap_StatementGeographicalAxis = trno_NorthernNewJerseyAndNewYorkMember
Area of real estate property	2,600,000us-gaap_AreaOfRealEstateProperty / us-gaap_StatementGeographicalAxis = trno_NorthernNewJerseyAndNewYorkMember
Washington DC and Baltimore [Member]
Real Estate Properties [Line Items]
Number of buildings	25us-gaap_NumberOfRealEstateProperties / us-gaap_StatementGeographicalAxis = trno_WashingtonDcAndBaltimoreMember
Area of real estate property	2,700,000us-gaap_AreaOfRealEstateProperty / us-gaap_StatementGeographicalAxis = trno_WashingtonDcAndBaltimoreMember
Northern New Jersey/New York City And Washington DC And Baltimore [Member]
Real Estate Properties [Line Items]
Percentage accounted by properties of its annualized base rent	48.90%trno_PercentageAccountedByPropertiesOfItsAnnualizedBaseRent / us-gaap_StatementGeographicalAxis = trno_NorthernNewJerseyNewYorkCityAndWashingtonDcAndBaltimoreMember

X

- Definition

Number of tenants.

+ References

No definition available.

+ Details

Name:	trno_NumberOfTenants
Namespace Prefix:	trno_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage accounted by properties of its annualized base rent.

+ References

No definition available.

+ Details

Name:	trno_PercentageAccountedByPropertiesOfItsAnnualizedBaseRent
Namespace Prefix:	trno_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Revenue percentage from largest customer.

+ References

No definition available.

+ Details

Name:	trno_RevenuePercentageFromLargestCustomer
Namespace Prefix:	trno_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=trno_NorthernNewJerseyAndNewYorkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=trno_NorthernNewJerseyNewYorkCityAndWashingtonDcAndBaltimoreMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementGeographicalAxis=trno_WashingtonDcAndBaltimoreMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: