Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Revenues
Management fees	$ 13,617		$ 9,616		$ 21,932		$ 17,929
Rental revenue	1,804		0		2,460		0
Investment income	617		0		769		0
Operating expense reimbursements	196		0		304		0
Other income	70		24		106		66
Total revenues	16,304		9,640		25,571		17,995
Expenses
Property management expenses	5,016		5,631		11,173		11,799
Property operating expenses	307		0		424		0
Total property operating expenses	5,323		5,631		11,597		11,799
Other-than-temporary impairment	1,682		0		1,682		0
Portion of impairment recognized in other comprehensive loss	0		0		0		0
Net impairment recognized in earnings	1,682		0		1,682		0
Depreciation and amortization	919		45		1,256		86
Interest Expense	85		0		85		0
Management, general and administrative	4,272		9,319		8,694		14,446
Acquisition expenses	698		0		1,249		0
Total expenses	12,979		14,995		24,563		26,331
Income (loss) from continuing operations before equity in income (loss) from joint ventures and provisions for taxes	3,325		(5,355)		1,008		(8,336)
Equity in net income (loss) of joint ventures	(2,603)		29		(3,791)		57
Income (loss) from continuing operations before provision for taxes and discontinued operations	722		(5,326)		(2,783)		(8,279)
Provision for taxes	(4,441)		(2,107)		(4,846)		(3,419)
Loss from continuing operations	(3,719)	[1]	(7,433)	[1]	(7,629)	[1]	(11,698)	[1]
Income (loss) from discontinued operations	(1,175)		(12,331)		9,970		(20,368)
Gain on sale of joint venture interest to a related party	0		0		1,317		0
Gains from disposals	0		53		389,140		11,996
Provision for taxes	0		0		(2,515)		0
Income (loss) from discontinued operations	(1,175)		(12,278)		397,912		(8,372)
Net income (loss) attributable to Gramercy Property Trust Inc.	(4,894)		(19,711)		390,283		(20,070)
Accrued preferred stock dividends	(1,790)		(1,790)		(3,580)		(3,580)
Net income (loss) available to common stockholders	(6,684)		(21,501)		386,703		(23,650)
Other comprehensive income (loss):
Unrealized holding gains (losses) arising during period	183		(11,888)		183		107,345
Reclassification of unrealized holding losses on debt securities and derivative instruments into discontinued operations	0		0		95,265		0
Other comprehensive income (loss):	183		(11,888)		95,448		107,345
Comprehensive income (loss) attributable to Gramercy Property Trust Inc.	(4,711)		(31,599)		485,731		87,275
Comprehensive income (loss) attributable to common stockholders	$ (6,501)		$ (33,389)		$ 482,151		$ 83,695
Basic earnings per share:
Net loss from continuing operations, after preferred dividends (in dollars per share)	$ (0.09)		$ (0.18)		$ (0.20)		$ (0.31)
Net income (loss) from discontinued operations	$ (0.02)		$ (0.24)		$ 6.79		$ (0.16)
Net income (loss) available to common stockholders (in dollars per share)	$ (0.11)		$ (0.42)		$ 6.59		$ (0.47)
Diluted earnings per share:
Net loss from continuing operations, after preferred dividends (in dollars per share)	$ (0.09)		$ (0.18)		$ (0.20)		$ (0.31)
Net income (loss) from discontinued operations	$ (0.02)		$ (0.24)		$ 6.79		$ (0.16)
Net income (loss) available to common stockholders (in dollars per share)	$ (0.11)		$ (0.42)		$ 6.59		$ (0.47)
Basic weighted average common shares outstanding (in shares)	58,605,219		50,759,306		58,641,447		50,739,482
Diluted weighted average common shares and common share equivalents outstanding (in shares)	58,605,219		50,759,306		58,641,447		50,739,482

[1] Net income (loss) from continuing operations represents loss before discontinued operations.