Investment in Unconsolidated and Consolidated Joint Ventures - Condensed Statements of Operations and Balance Sheet Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Statement of Operations
Joint Venture Revenues	$ 27,511	$ 29,711
Joint Venture Earnings (Loss)	2,204	1,377
TRC Equity in Earnings (Loss)	1,355	876
Balance Sheet Information
Joint Venture Assets	240,892		$ 238,828
Joint Venture Debt	(133,847)		(131,254)
Joint Venture Equity	97,802		97,578
TRC Equity	39,554		38,240
Petro Travel Plaza Holdings, LLC
Statement of Operations
Joint Venture Revenues	23,213	25,406
Joint Venture Earnings (Loss)	2,539	1,870
TRC Equity in Earnings (Loss)	1,523	1,122
Balance Sheet Information
Joint Venture Assets	80,057		77,835
Joint Venture Debt	(15,288)		(15,287)
Joint Venture Equity	62,600		60,061
TRC Equity	25,159		23,636
Five West Parcel, LLC
Statement of Operations
Joint Venture Revenues	0	684
Joint Venture Earnings (Loss)	(1)	171
TRC Equity in Earnings (Loss)	(1)	86
Balance Sheet Information
Joint Venture Assets	650		694
Joint Venture Debt	0		0
Joint Venture Equity	647		648
TRC Equity	139		140
18-19 West, LLC
Statement of Operations
Joint Venture Revenues	3	3
Joint Venture Earnings (Loss)	(30)	(28)
TRC Equity in Earnings (Loss)	(15)	(14)
Balance Sheet Information
Joint Venture Assets	4,627		4,849
Joint Venture Debt	0		0
Joint Venture Equity	4,369		4,600
TRC Equity	1,615		1,730
TRCC/Rock Outlet Center, LLC
Statement of Operations
Joint Venture Revenues	1,863	1,898
Joint Venture Earnings (Loss)	(812)	(785)
TRC Equity in Earnings (Loss)	(406)	(393)
Non-cash tenant allowance amortization	500	500
Balance Sheet Information
Joint Venture Assets	68,650		69,459
Joint Venture Debt	(38,468)		(38,909)
Joint Venture Equity	29,377		29,688
TRC Equity	6,625		6,781
TRC-MRC 1, LLC
Statement of Operations
Joint Venture Revenues	787	736
Joint Venture Earnings (Loss)	40	(5)
TRC Equity in Earnings (Loss)	20	(2)
Balance Sheet Information
Joint Venture Assets	28,761		28,673
Joint Venture Debt	(24,405)		(24,542)
Joint Venture Equity	3,570		3,623
TRC Equity	0		0
TRC-MRC 2, LLC
Statement of Operations
Joint Venture Revenues	1,020	984
Joint Venture Earnings (Loss)	343	154
TRC Equity in Earnings (Loss)	172	77
Balance Sheet Information
Joint Venture Assets	20,101		20,026
Joint Venture Debt	(24,311)		(24,455)
Joint Venture Equity	(8,938)		(7,094)
TRC Equity	0		0
TRC-MRC 3, LLC
Statement of Operations
Joint Venture Revenues	625	0
Joint Venture Earnings (Loss)	125	0
TRC Equity in Earnings (Loss)	62	0
Balance Sheet Information
Joint Venture Assets	38,046		37,292
Joint Venture Debt	(31,375)		(28,061)
Joint Venture Equity	6,177		6,052
TRC Equity	6,016		5,953
Centennial
Statement of Operations
Joint Venture Revenues	47	122
Joint Venture Earnings (Loss)	(27)	$ 64
Balance Sheet Information
Joint Venture Assets	96,847		96,415
Joint Venture Debt	0		0
Joint Venture Equity	$ 96,641		$ 96,143