Discontinued Operations - Revenues and Expenses in Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Income from office and parking properties	$ 52	$ 3,196	$ 99	$ 13,418
Operating expense	341	1,444	364	6,128
Depreciation and amortization	0	914	116	4,236
Impairment loss on real estate	0	5,600	0	10,200
Management company expense	0	(41)	0	(39)
Interest expense	0	142	0	425
Total expenses	341	8,059	480	20,950
Loss from discontinued operations	(289)	(4,863)	(381)	(7,532)
Gain on sale of real estate from discontinued operations	0	11,545	10,463	12,087
Total discontinued operations	(289)	6,682	10,082	4,555
Net (income) loss attributable to noncontrolling interest from discontinued operations	111	(266)	(406)	(532)
Total discontinued operations-Company's share	$ (178)	$ 6,416	$ 9,676	$ 4,023