Contribution for joint venture for future development.

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- Definition

Development of building.

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Lease of building.

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Number of joint venture contracts.

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Area of land held.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Investment in Unconsolidated and Consolidated Joint Ventures - Investment Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 joint_venture	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2013
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$ 32,666,000		$ 32,604,000
Equity in earnings (losses)	1,150,000	438,000
Number of joint venture contracts	3trc_NumberOfJointVentureContracts
Long-term debt	78,060,000us-gaap_LongTermDebt		81,309,000us-gaap_LongTermDebt
Line of Credit
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity				52,000,000
Petro Travel Plaza Holdings LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	1,160,000	599,000
Unconsolidated joint ventures, ownership interest	60.00%
Unconsolidated joint ventures, voting rights	50.00%
Long-term debt	15,604,000		15,808,000
Investment in unconsolidated joint ventures	17,609,000
Tejon Mountain Village LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)		(21,000)
Rockefeller Joint Ventures
Schedule of Equity Method Investments [Line Items]
Number of joint venture contracts	3
Number of acres for development	91
Development of land in TRCC including pursuing foreign trade zone	500
Investment in unconsolidated joint ventures	15,057,000
Five West Parcel LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	91,000	29,000
Unconsolidated joint ventures, ownership interest	50.00%
Area of building owned and leased	606,000
Long-term debt	11,000,000		11,000,000
18-19 West LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	(1,000)	3,000
Unconsolidated joint ventures, ownership interest	50.00%
Long-term debt	0		0
Number of acres for development	61.5
TRCC-East
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures					87,000,000
Number of acres for development		326,000
TRCC/Rock Outlet Center
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures					0
Equity in earnings (losses)	(100,000)	(172,000)
Long-term debt	51,134,000		45,449,000
Centennial Founders, LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	0	0
Consolidated joint venture, ownership interest	74.08%
Long-term debt
Building Development \| Rockefeller Joint Ventures
Schedule of Equity Method Investments [Line Items]
Number of joint venture contracts	2