Contribution for joint venture for future development.

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- Definition

Development of building.

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- Definition

Lease of building.

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Number of joint venture contracts.

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- Definition

Area of land held.

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- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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- Definition

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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- Definition

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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- Definition

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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- Definition

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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- Definition

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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- Definition

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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- Definition

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

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No definition available.

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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 $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014 joint_venture acre	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013 acre	Jun. 30, 2012
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$ 32,604,000	$ 62,604,000
Equity in earnings (losses)	5,294,000	4,006,000	2,535,000
Number of joint venture contracts	3trc_NumberOfJointVentureContracts
Development of land in TRCC including pursuing Foreign Trade Zone	270,000us-gaap_AreaOfLand
Long-term Debt	(81,309,000)us-gaap_LongTermDebt	(4,693,000)us-gaap_LongTermDebt
Line of Credit
Schedule of Equity Method Investments [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	52,000,000
Petro Travel Plaza Holdings LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	4,937,000	3,925,000
Ownership percentage	60.00%
Unconsolidated joint ventures, voiting rights	50.00%
Long-term Debt	(15,808,000)	(16,602,000)
Investment in unconsolidated joint ventures	16,448,000
Tejon Mountain Village LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	(35,000)	(59,000)
Long-term Debt		0
Rockefeller Joint Ventures
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures				335,000
Number of joint venture contracts	2
Number of acres for development	91
Development of land in TRCC including pursuing Foreign Trade Zone	500
Investment in unconsolidated joint ventures	16,156,000
Five West Parcel LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	221,000	13,000
Ownership percentage	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)	7,000	27,000
Ownership percentage	50.00%
Long-term Debt	0	0
Number of acres for development	61.5
TRCC-East [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures				87,000,000
Number of acres for development				326,000.0
Equity Method Investment, Aggregate Cost					2,159,000
TRCC/Rock Outlet Center
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures				0
Equity in earnings (losses)	164,000	100,000
Long-term Debt	(45,449,000)	0
Investment in unconsolidated joint ventures				10,558,000
Centennial Founders, LLC
Schedule of Equity Method Investments [Line Items]
Equity in earnings (losses)	0	0
Consolidated joint venture, ownership interest	74.05%
Long-term Debt		$ 0