Discontinued Operations and Real Estate Held for Sale (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended						0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012 Becket House	Jun. 30, 2013 Becket House Leasehold interest	Mar. 31, 2013 Becket House Leasehold interest	Dec. 31, 2012 Becket House Leasehold interest	Dec. 31, 2012 Becket House Lease Intangibles	Jun. 30, 2013 Consolidated properties item	Dec. 31, 2012 Real estate held for sale item	May 18, 2012 Santa Clara 700/750 Joint Venture	May 29, 2012 Tanglewood at Voss	Oct. 16, 2012 Bent Tree Green	Apr. 05, 2013 Becket House	Aug. 16, 2012 5000 S. Bowen Road	May 28, 2013 Rio Salado
Discontinued operations and Real Estate Held for Sale
Number of properties										3	1
Contract sales price												$ 47,800,000	$ 52,500,000	$ 12,000,000	$ 19,800,000	$ 25,900,000	$ 9,300,000
Revenues
Rental revenue		3,117,000	430,000	7,042,000
Expenses
Property operating expenses	(18,000)	826,000	192,000	1,572,000
Bad debt expense		36,000	(111,000)	57,000
Interest expense		1,780,000	634,000	3,610,000
Real estate taxes	5,000	442,000	9,000	1,100,000
Impairment charge			305,000			0	300,000
Property management fees		123,000	24,000	235,000
Asset management fees		150,000	16,000	364,000
Depreciation and amortization		940,000		2,401,000
Total expenses	(13,000)	4,297,000	1,069,000	9,339,000
Realized loss on currency translation	(3,624,000)		(3,624,000)												3,600,000
Gain on troubled debt restructuring	8,132,000		8,132,000												8,100,000
Gain on sale of real estate property		4,126,000		4,126,000													100,000
Income from discontinued operations	4,521,000	2,946,000	3,869,000	1,829,000
Assets and liabilities associated with the real estate held for sale net of impairment
Intangibles assets, net								19,580,000	274,000
Assets associated with real estate held for sale					19,854,000
Notes payable					25,360,000
Accrued interest payable					3,567,000
Obligations associated with real estate held for sale					$ 28,927,000