Supplemental Condensed Combining Financial Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues;
Revenues from rental properties	$ 26,775	$ 26,893	$ 57,832	$ 51,685
Interest on notes and mortgages receivable	700	741	1,381	1,146
Total revenues	27,475	27,634	59,213	52,831
Operating expenses:
Rental property expenses	7,999	3,721	14,600	7,209
Impairment charges	2,511	1,263	2,871	2,257
Environmental expenses, net	2,136	1,325	2,648	2,452
General and administrative expenses	10,547	2,736	23,680	7,621
Depreciation and amortization expense	3,487	2,158	7,474	4,476
Total operating expenses	23,980	11,203	48,634	24,015
Operating income (loss)	3,495	16,431	10,579	28,816
Other income (expense), net	(1)	(49)	332	(43)
Interest expense	(2,692)	(1,346)	(4,175)	(2,665)
Earnings (loss) from continuing operations	802	15,036	6,736	26,108
Discontinued operations:
Income (loss) from operating activities	116	(65)	172	181
Gains on dispositions of real estate	2,708	231	3,203	299
Earnings (loss) from discontinued operations	2,824	166	3,375	480
Net earnings (loss)	3,626	15,202	10,111	26,588
Getty Petroleum Marketing [Member]
Revenues;
Revenues from rental properties		13,990		28,619
Total revenues		13,990		28,619
Operating expenses:
Rental property expenses		1,275		2,697
Impairment charges				994
Environmental expenses, net		1,294		2,396
General and administrative expenses		31		75
Depreciation and amortization expense		905		1,940
Total operating expenses		3,505		8,102
Operating income (loss)		10,485		20,517
Other income (expense), net		20		20
Earnings (loss) from continuing operations		10,505		20,537
Discontinued operations:
Income (loss) from operating activities		164		365
Gains on dispositions of real estate		231		299
Earnings (loss) from discontinued operations		395		664
Net earnings (loss)		10,900		21,201
Other Tenants [Member]
Revenues;
Revenues from rental properties		12,903		23,066
Interest on notes and mortgages receivable		710		1,083
Total revenues		13,613		24,149
Operating expenses:
Rental property expenses		2,294		4,221
Impairment charges		1,263		1,263
Environmental expenses, net		31		56
General and administrative expenses		1,679		1,764
Depreciation and amortization expense		1,242		2,515
Total operating expenses		6,509		9,819
Operating income (loss)		7,104		14,330
Earnings (loss) from continuing operations		7,104		14,330
Discontinued operations:
Income (loss) from operating activities		(229)		(184)
Earnings (loss) from discontinued operations		(229)		(184)
Net earnings (loss)		6,875		14,146
Corporate [Member]
Revenues;
Interest on notes and mortgages receivable		31		63
Total revenues		31		63
Operating expenses:
Rental property expenses		152		291
General and administrative expenses		1,026		5,782
Depreciation and amortization expense		11		21
Total operating expenses		1,189		6,094
Operating income (loss)		(1,158)		(6,031)
Other income (expense), net		(69)		(63)
Interest expense		(1,346)		(2,665)
Earnings (loss) from continuing operations		(2,573)		(8,759)
Discontinued operations:
Net earnings (loss)		$ (2,573)		$ (8,759)