Investment in Unconsolidated and Consolidated Joint Ventures - Condensed Statements of Operations and Balance Sheet Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Statement of Operations
Equity in earnings (losses)	$ 1,656	$ 1,148	$ 2,806	$ 1,586
Balance Sheet Information
Current assets	60,441		60,441		$ 65,927
Property and equipment, net	44,764		44,764		43,094
Long-term debt	(78,298)		(78,298)		(81,309)
Unconsolidated Properties [Member]
Statement of Operations
Revenues			61,354	56,879
Net income (loss)			4,695	2,660
Partner’s share of net income (loss)			1,889	1,074
Equity in earnings (losses)			2,806	1,586
Balance Sheet Information
Current assets	28,381		28,381		25,101
Property and equipment, net	132,476		132,476		133,609
Other assets	21,211		21,211		19,872
Long-term debt	(77,852)		(77,852)		(72,257)
Other liabilities	(3,588)		(3,588)		(8,321)
Net assets	100,628		100,628		98,004
Petro Travel Plaza Holdings LLC
Statement of Operations
Revenues			55,180	54,658
Net income (loss)			4,583	2,555
Partner’s share of net income (loss)			1,833	1,021
Equity in earnings (losses)			2,751	1,534
Balance Sheet Information
Current assets	22,357		22,357		18,960
Property and equipment, net	48,114		48,114		48,011
Other assets	286		286		181
Long-term debt	(15,399)		(15,399)		(15,808)
Other liabilities	(2,694)		(2,694)		(3,263)
Net assets	52,664		52,664		48,081
Five West Parcel LLC
Statement of Operations
Revenues			1,856	1,710
Net income (loss)			472	136
Partner’s share of net income (loss)			236	68
Equity in earnings (losses)			236	68
Balance Sheet Information
Current assets	2,606		2,606		3,834
Property and equipment, net	14,050		14,050		14,869
Other assets	73		73		67
Long-term debt	(11,000)		(11,000)		(11,000)
Other liabilities	(127)		(127)		(440)
Net assets	5,602		5,602		7,330
18-19 West LLC
Statement of Operations
Revenues			13	31
Net income (loss)			(59)	19
Partner’s share of net income (loss)			(30)	10
Equity in earnings (losses)			(30)	9
Balance Sheet Information
Current assets	82		82		5
Property and equipment, net	4,617		4,617		4,617
Other assets	0		0		0
Long-term debt	0		0		0
Other liabilities	(9)		(9)		(2)
Net assets	4,690		4,690		4,620
TRCC/Rock Outlet Center
Statement of Operations
Revenues			4,305	480
Net income (loss)			(301)	20
Partner’s share of net income (loss)			(150)	10
Equity in earnings (losses)			(151)	10
Balance Sheet Information
Current assets	3,336		3,336		2,302
Property and equipment, net	65,695		65,695		66,112
Other assets	20,852		20,852		19,624
Long-term debt	(51,453)		(51,453)		(45,449)
Other liabilities	(758)		(758)		(4,616)
Net assets	37,672		37,672		37,973
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 Founders, LLC
Statement of Operations
Revenues			205	407
Net income (loss)			(175)	(32)
Partner’s share of net income (loss)			(45)	(8)
Equity in earnings (losses)			0	$ 0
Balance Sheet Information
Current assets	44		44		651
Property and equipment, net	78,797		78,797		77,373
Other assets	12		12		0
Long-term debt	0		0		0
Other liabilities	(612)		(612)		(158)
Net assets	$ 78,241		$ 78,241		$ 77,866