Investment in Unconsolidated and Consolidated Joint Ventures - Additional Information (Details)	1 Months Ended			3 Months Ended		12 Months Ended
	Nov. 30, 2018 ft²	Sep. 30, 2016 USD ($) ft²	Aug. 31, 2016 USD ($) ft²	Dec. 31, 2019	Jun. 30, 2013 USD ($) ft² member	Dec. 31, 2018 USD ($) a ft² joint_venture	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 01, 2018 USD ($)	Nov. 30, 2016 USD ($)	Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures						$ 28,602,000	$ 30,031,000
Equity in earnings (losses)						3,834,000	4,227,000	$ 7,098,000
Borrowings						$ 121,326,000	114,272,000
Area of land to be developed (up to) (in acres) | a						270,000
Centennial Founders, LLC
Schedule of Equity Method Investments [Line Items]
Reduction of noncontrolling interest in joint venture						$ 13,172,000				$ 11,039,000
Consolidated joint venture, ownership interest						83.50%
Line of Credit
Schedule of Equity Method Investments [Line Items]
Construction line of credit											$ 52,000,000
Petro Travel Plaza Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Unconsolidated joint ventures, voting rights						50.00%
Ownership percentage						60.00%
Investment in unconsolidated joint ventures						$ 18,426,000
Borrowings						15,283,000	15,279,000
Majestic Realty Co.
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures			$ 24,773,000
Investment in unconsolidated joint ventures						$ 0
Number of joint venture contracts | joint_venture						3
Area of building owned and leased | ft²			651,909
TRC-MRC 3, LLC
Schedule of Equity Method Investments [Line Items]
Number of acres for development | ft²	579,000
TRC-MRC 3, LLC | Scenario, Forecast
Schedule of Equity Method Investments [Line Items]
Percentage of rentable space occupied				67.00%
TRC-MRC 2, LLC
Schedule of Equity Method Investments [Line Items]
Face amount									$ 25,240,000
Borrowings						$ 25,014,000	21,080,000
Excess distributions resulting in deficit balance						2,526,000
TRCC-East
Schedule of Equity Method Investments [Line Items]
Number of acres for development | ft²					326,000
Area of building owned and leased | ft²		480,480
Excess distributions resulting in deficit balance						264,000
TRC-MRC 1, LLC
Schedule of Equity Method Investments [Line Items]
Borrowings						25,030,000	19,433,000
Borrowings under joint venture		$ 25,030,000
Rockefeller Joint Ventures
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated joint ventures						$ 10,176,000
Number of joint venture contracts | joint_venture						3
Number of acres for development | a						91
Area of land to be developed (up to) (in acres) | a						500
Rockefeller Joint Ventures | Building Improvements
Schedule of Equity Method Investments [Line Items]
Number of joint venture contracts | joint_venture						2
Five West Parcel, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%
Area of building owned and leased | ft²						606,000
Borrowings						$ 9,173,000	9,711,000
18-19 West, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage						50.00%
Borrowings						$ 0	0
Number of acres for development | a						61.5
TRCC/Rock Outlet Center, LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures					$ 87,000,000
Borrowings						$ 46,826,000	$ 48,769,000
Construction loan percent of costs					60.00%
Equity contributions					40.00%
Number of members | member					2