REAL ESTATE HELD FOR INVESTMENT(Schedule of Real Estate Investments) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended			12 Months Ended												12 Months Ended
	Jan. 11, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Village Overlook Buildings [Member]	Dec. 31, 2012 Academy Point Atrium I [Member]	Dec. 31, 2012 Northridge Center I & II [Member]	Dec. 31, 2012 Iron Point Business Park [Member]	Dec. 31, 2012 1635 N. Cahuenga Building [Member]	Dec. 31, 2012 Powers Ferry Landing East [Member]	Dec. 31, 2012 Bellevue Technology Center [Member]	Dec. 31, 2012 1800 West Loop [Member]	Dec. 31, 2012 West Loop I & II [Member]	Dec. 31, 2012 Burbank Collection [Member]	Dec. 31, 2012 Roseville Commerce Center [Member]	Dec. 31, 2012 Richardson Portfolio [Member]	Dec. 31, 2012 Palisades Central I [Member]	Dec. 31, 2012 Palisades Central II [Member]	Dec. 31, 2012 Greenway I [Member]	Dec. 31, 2012 Greenway III [Member]	Dec. 31, 2012 Undeveloped Land [Member]	Dec. 31, 2012 Park Highlands [Member]	Dec. 31, 2012 Land [Member]	Dec. 31, 2011 Land [Member]	Dec. 31, 2012 Land [Member] Village Overlook Buildings [Member]	Dec. 31, 2012 Land [Member] Academy Point Atrium I [Member]	Dec. 31, 2012 Land [Member] Northridge Center I & II [Member]	Dec. 31, 2012 Land [Member] Iron Point Business Park [Member]	Dec. 31, 2012 Land [Member] 1635 N. Cahuenga Building [Member]	Dec. 31, 2012 Land [Member] Powers Ferry Landing East [Member]	Dec. 31, 2012 Land [Member] Bellevue Technology Center [Member]	Dec. 31, 2012 Land [Member] 1800 West Loop [Member]	Dec. 31, 2012 Land [Member] West Loop I & II [Member]	Dec. 31, 2012 Land [Member] Burbank Collection [Member]	Dec. 31, 2012 Land [Member] Roseville Commerce Center [Member]	Dec. 31, 2012 Land [Member] Richardson Portfolio [Member]	Dec. 31, 2012 Land [Member] Palisades Central I [Member]	Dec. 31, 2012 Land [Member] Palisades Central II [Member]	Dec. 31, 2012 Land [Member] Greenway I [Member]	Dec. 31, 2012 Land [Member] Greenway III [Member]	Dec. 31, 2012 Land [Member] Undeveloped Land [Member]	Dec. 31, 2012 Land [Member] Park Highlands [Member]	Dec. 31, 2012 Buildings and Improvements [Member]	Dec. 31, 2011 Buildings and Improvements [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Village Overlook Buildings [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Academy Point Atrium I [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Northridge Center I & II [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Iron Point Business Park [Member]	Dec. 31, 2012 Buildings and Improvements [Member] 1635 N. Cahuenga Building [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Powers Ferry Landing East [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Bellevue Technology Center [Member]	Dec. 31, 2012 Buildings and Improvements [Member] 1800 West Loop [Member]	Dec. 31, 2012 Buildings and Improvements [Member] West Loop I & II [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Burbank Collection [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Roseville Commerce Center [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Richardson Portfolio [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Palisades Central I [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Palisades Central II [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Greenway I [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Greenway III [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Undeveloped Land [Member]	Dec. 31, 2012 Buildings and Improvements [Member] Park Highlands [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member]	Dec. 31, 2011 Tenant Origination and Absorption Costs [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Village Overlook Buildings [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Academy Point Atrium I [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Northridge Center I & II [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Iron Point Business Park [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] 1635 N. Cahuenga Building [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Powers Ferry Landing East [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Bellevue Technology Center [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] 1800 West Loop [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] West Loop I & II [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Burbank Collection [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Roseville Commerce Center [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Richardson Portfolio [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Palisades Central I [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Palisades Central II [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Greenway I [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Greenway III [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Undeveloped Land [Member]	Dec. 31, 2012 Tenant Origination and Absorption Costs [Member] Park Highlands [Member]
Real Estate Properties [Line Items]
Date acquired or foreclosed on				Aug. 02, 2010	Nov. 03, 2010	Mar. 25, 2011	Jun. 21, 2011	Aug. 03, 2011	Sep. 24, 2012	Jul. 31, 2012	Dec. 04, 2012	Dec. 07, 2012	Dec. 12, 2012	Jun. 27, 2011		Nov. 23, 2011	Nov. 23, 2011	Nov. 23, 2011	Nov. 23, 2011	Nov. 23, 2011	Dec. 30, 2011
Total real estate, cost		$ 322,765	$ 105,832	$ 1,758	$ 4,600	$ 7,308	$ 20,074	$ 8,014	$ 16,667	$ 77,926	$ 67,688	$ 37,072	$ 12,974	$ 3,961	$ 41,883	$ 9,882	$ 18,706	$ 2,233	$ 5,309	$ 5,753	$ 22,840	$ 92,559	$ 41,409	$ 440	$ 1,650	$ 2,234	$ 2,671	$ 3,112	$ 4,261	$ 25,506	$ 8,360	$ 7,300	$ 4,175	$ 1,147	$ 8,863	$ 1,037	$ 810	$ 561	$ 702	$ 5,753	$ 22,840	$ 207,208	$ 56,188	$ 1,318	$ 2,950	$ 4,831	$ 16,874	$ 4,555	$ 10,825	$ 47,554	$ 53,541	$ 26,093	$ 7,670	$ 2,424	$ 28,573	$ 7,392	$ 15,846	$ 1,672	$ 3,663	$ 0	$ 0	$ 22,998	$ 8,235	$ 0	$ 0	$ 243	$ 529	$ 347	$ 1,581	$ 4,866	$ 5,787	$ 3,679	$ 1,129	$ 390	$ 4,447	$ 1,453	$ 2,050	$ 0	$ 944	$ 0	$ 0
Accumulated depreciation and amortization		(8,451)	(2,576)	(156)	(211)	(608)	(1,287)	(440)	(747)	(1,521)	(154)	(120)	(23)	(271)	(2,913)	(935)	(1,435)	(58)	(485)	0	0
Total real estate, net		$ 314,314	$ 103,256	$ 1,602	$ 4,389	$ 6,700	$ 18,787	$ 7,574	$ 15,920	$ 76,405	$ 67,534	$ 36,952	$ 12,951	$ 3,690	$ 38,970	$ 8,947	$ 17,271	$ 2,175	$ 4,824	$ 5,753	$ 22,840
Ownership %	90.00%			100.00%	100.00%	100.00%	100.00%	70.00%	100.00%	100.00%	100.00%	100.00%	90.00%	100.00%		90.00%	90.00%	90.00%	90.00%	90.00%	50.10%