Investment in Unconsolidated and Consolidated Joint Ventures - Condensed Statements of Operations and Balance Sheet Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Operations
Equity in earnings (losses)	$ 6,324	$ 5,294	$ 4,006
Balance Sheet Information
Current assets	48,893	64,838
Property and equipment, net	44,469	43,094
Long-term debt	(74,215)
Unconsolidated Properties
Statement of Operations
Revenues	128,192	131,499
Net income (loss)	10,523	8,944
Partner’s share of net income (loss)	4,199	3,649
Equity in earnings (losses)	6,324	5,294
Balance Sheet Information
Current assets	20,046	25,101
Property and equipment, net	135,459	133,609
Other assets	20,275	19,872
Long-term debt	(77,255)	(72,257)
Other liabilities	(4,071)	(8,321)
Net assets	94,454	98,004
Petro Travel Plaza Holdings
Statement of Operations
Revenues	115,776	122,584
Net income (loss)	10,629	8,229
Partner’s share of net income (loss)	4,252	3,291
Equity in earnings (losses)	6,377	4,937
Balance Sheet Information
Current assets	12,013	18,960
Property and equipment, net	52,296	48,011
Other assets	264	181
Long-term debt	(14,973)	(15,808)
Other liabilities	(2,890)	(3,263)
Net assets	46,710	48,081
Five West Parcel
Statement of Operations
Revenues	3,408	3,635
Net income (loss)	1,084	442
Partner’s share of net income (loss)	542	221
Equity in earnings (losses)	542	221
Balance Sheet Information
Current assets	3,277	3,834
Property and equipment, net	13,704	14,869
Other assets	297	67
Long-term debt	(10,725)	(11,000)
Other liabilities	(340)	(440)
Net assets	6,213	7,330
18-19 West LLC
Statement of Operations
Revenues	20	60
Net income (loss)	(108)	15
Partner’s share of net income (loss)	(54)	8
Equity in earnings (losses)	(54)	7
Balance Sheet Information
Current assets	23	5
Property and equipment, net	4,617	4,617
Other assets	0	0
Long-term debt	0	0
Other liabilities	0	(2)
Net assets	4,640	4,620
TRCC/Rock Outlet Center
Statement of Operations
Revenues	8,988	5,220
Net income (loss)	(1,082)	328
Partner’s share of net income (loss)	(541)	164
Equity in earnings (losses)	(541)	164
Balance Sheet Information
Current assets	4,733	2,302
Property and equipment, net	64,842	66,112
Other assets	19,714	19,624
Long-term debt	(51,557)	(45,449)
Other liabilities	(841)	(4,616)
Net assets	36,891	37,973
Rental income	11,100	5,900
Non-cash tenant allowance amortization	2,100	700
Tejon Mountain Village LLC
Statement of Operations
Revenues		0
Net income (loss)		(70)
Partner’s share of net income (loss)		(35)
Equity in earnings (losses)		(35)
Centennial-VIE
Statement of Operations
Revenues	749	1,361
Net income (loss)	(140)	415
Partner’s share of net income (loss)	(38)	107
Equity in earnings (losses)	0	0
Balance Sheet Information
Current assets	230	651
Property and equipment, net	81,742	77,373
Other assets	$ 9	0
Long-term debt		0
Other liabilities	$ (754)	(158)
Net assets	$ 81,227	$ 77,866