Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Total revenues	$ 16,304		$ 9,640		$ 25,571		$ 17,995
Equity in net loss from unconsolidated joint ventures	(2,603)		29		(3,791)		57
Total operating and interest expense	(17,420)	[1]	(17,102)	[1]	(29,409)	[1]	(29,750)	[1]
Net income (loss) from continuing operation	(3,719)	[2]	(7,433)	[2]	(7,629)	[2]	(11,698)	[2]
Assets:
Total assets	329,904				329,904				2,168,836
Finance [Member]
Total revenues	0		0		0		0
Equity in net loss from unconsolidated joint ventures	0		0		0		0
Total operating and interest expense	0	[1]	0	[1]	0	[1]	0	[1]
Net income (loss) from continuing operation	0	[2]	0	[2]	0	[2]	0	[2]
Assets:
Total assets	0				0				1,937,554
Assets Management [Member]
Total revenues	13,617		9,616		21,932		17,929
Equity in net loss from unconsolidated joint ventures	0		0		0		0
Total operating and interest expense	(10,463)	[1]	(8,999)	[1]	(17,718)	[1]	(16,540)	[1]
Net income (loss) from continuing operation	3,154	[2]	617	[2]	4,214	[2]	1,389	[2]
Assets:
Total assets	16,126				16,126				0
Realty / Corporate [Member]
Total revenues	2,687		24		3,639		66
Equity in net loss from unconsolidated joint ventures	(2,603)		29		(3,791)		57
Total operating and interest expense	(6,957)	[1]	(8,103)	[1]	(11,691)	[1]	(13,210)	[1]
Net income (loss) from continuing operation	(6,873)	[2]	(8,050)	[2]	(11,843)	[2]	(13,087)	[2]
Assets:
Total assets	$ 313,778				$ 313,778				$ 231,282

[1] Total operating and interest expense includes operating costs on commercial property assets for the Investments segment and costs to perform required functions under the management agreement for the Asset Management segment. Depreciation and amortization of $1,256 and $86 and provision for taxes of $4,846 and $3,419 for the six months ended June 30, 2013 and 2012, respectively, are included in the amounts presented above. Depreciation and amortization of $919 and $45 and provision for taxes of $4,441 and $2,107 for the three months ended June 30, 2013 and 2012, respectively, are included in the amounts presented above.

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