INTANGIBLES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible assets and liabilities
Amortization/accretion of intangible assets and liabilities	$ 10,300	$ 1,800	$ 3,100
Estimated future amortization
2016	8,400
2017	8,000
2018	5,000
2019	800
2020	400
Thereafter	15,500
Leases, Acquired-in-Place
Intangible assets and liabilities
Gross Assets	39,129	39,634
Accumulated Amortization	(16,990)	(6,919)
Net Carrying Amount	22,139	32,715
Tenant Leases above Market
Intangible assets and liabilities
Gross Assets	5,333	5,342
Accumulated Amortization	(1,752)	(686)
Net Carrying Amount	3,581	4,656
Tenant Leases below Market
Intangible assets and liabilities
Gross Liability	(6,163)	(6,184)
Accumulated Accretion	1,350	296
Net Carrying Amount	(4,813)	(5,888)
Ground Leases above Market
Intangible assets and liabilities
Gross Liability	(3,545)	(3,545)
Accumulated Accretion	1,432	1,273
Net Carrying Amount	(2,113)	(2,272)
Ground Leases below Market
Intangible assets and liabilities
Gross Assets	23,096	23,096
Accumulated Amortization	(3,771)	(3,433)
Net Carrying Amount	$ 19,325	$ 19,663