Contribution for joint venture for future development.

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- Definition

Development of building.

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Equity Method Investment, Summarized Financial Information, Long-Term Debt

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Equity Method investment, Summarized Financial Information, Maximum Borrowing Capacity

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- Definition

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Construction Loan Costs, Percent

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No definition available.

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- Definition

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Equity Contributions, Percent

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No definition available.

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- Definition

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Number of Members

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No definition available.

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- Definition

Lease of building.

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No definition available.

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- Definition

Number of joint venture contracts.

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No definition available.

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- Definition

Area of land held.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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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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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 1
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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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-Article 5

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 7

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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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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
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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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
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Investment in Unconsolidated and Consolidated Joint Ventures - Investment Information (Details)	1 Months Ended		3 Months Ended			9 Months Ended
	Sep. 30, 2016 USD ($) a ft²	Aug. 31, 2016 USD ($) ft²	Sep. 30, 2016 USD ($) a	Sep. 30, 2015 USD ($)	Jun. 30, 2013 USD ($) ft² member	Sep. 30, 2016 USD ($) a ft² joint_venture	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$ 32,255,000		$ 32,255,000			$ 32,255,000		$ 30,680,000
Equity in earnings (loss)			2,353,000	$ 2,055,000		5,650,000	$ 4,861,000
Summarized financial information, long-term debt	97,963,000		97,963,000			97,963,000		77,255,000
Promissory note agreement
Schedule of Equity Method Investments [Line Items]
Debt instrument face amount									$ 4,750,000
Line of Credit
Schedule of Equity Method Investments [Line Items]
Summarized financial information, maximum borrowing capacity	$ 52,000,000		$ 52,000,000			$ 52,000,000
Petro Travel Plaza Holdings LLC
Schedule of Equity Method Investments [Line Items]
Unconsolidated joint ventures, voting rights						50.00%
Unconsolidated joint ventures, ownership interest	60.00%		60.00%			60.00%
Investment in unconsolidated joint ventures	$ 16,566,000		$ 16,566,000			$ 16,566,000
Summarized financial information, long-term debt	15,274,000		15,274,000			15,274,000		14,973,000
Majestic Realty Co.
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures		$ 24,773,000
Investment in unconsolidated joint ventures	1,888,000		1,888,000			$ 1,888,000
Number of joint venture contracts \| joint_venture						2
Area of building owned and leased \| ft²		651,909
Summarized financial information, long-term debt		$ 20,926,000						0
Majestic Realty Co. \| Promissory note agreement
Schedule of Equity Method Investments [Line Items]
Debt instrument face amount		$ 21,080,000
Rockefeller Joint Ventures
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint ventures	13,801,000		13,801,000			$ 13,801,000
Number of joint venture contracts \| joint_venture						3
Summarized financial information, long-term debt	$ 61,763,000		$ 61,763,000			$ 61,763,000		$ 62,282,000
Number of acres for development \| a						91
Development of land in TRCC including pursuing foreign trade zone (up to) \| a	500		500			500
Five West Parcel
Schedule of Equity Method Investments [Line Items]
Unconsolidated joint ventures, ownership interest	50.00%		50.00%			50.00%
Area of building owned and leased \| ft²						606,000
Summarized financial information, long-term debt	$ 10,385,000		$ 10,385,000			$ 10,385,000
18-19 West LLC
Schedule of Equity Method Investments [Line Items]
Unconsolidated joint ventures, ownership interest	50.00%		50.00%			50.00%
Number of acres for development \| a						61.5
TRCC-East
Schedule of Equity Method Investments [Line Items]
Area of building owned and leased \| ft²	480,480
Number of acres for development \| ft²					326,000
TRCC/Rock Outlet Center
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures					$ 87,000,000
Unconsolidated joint ventures, voting rights					50.00%
Summarized financial information, long-term debt	$ 51,378,000		$ 51,378,000			$ 51,378,000
Construction loan percent of costs					60.00%
Equity contributions, percent					40.00%
Number of members \| member					2
Centennial \| Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Equity in earnings (loss)						$ 0	$ 0
Consolidated joint venture, ownership interest	76.32%		76.32%			76.32%
Building Development \| Rockefeller Joint Ventures
Schedule of Equity Method Investments [Line Items]
Number of joint venture contracts \| joint_venture						2