Real Estate - Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of in-place lease valuation
In-place lease valuation (above market)	$ 47,419	$ 46,227
In-place lease valuation (above market) - accumulated amortization	(17,885)	(10,994)
In-place lease valuation (above market), net	29,534	35,233
Ground leasehold interest (below market)	2,254	2,254
Ground leasehold interest (below market) - accumulated amortization	(75)	(54)
Ground leasehold interest (below market), net	2,179	2,200
Intangible assets, net	31,713	37,433
In-place lease valuation (below market)	(51,966)	(55,774)
In-place lease valuation (below market) - accumulated amortization	18,740	14,068
In-place lease valuation (below market), net	(33,226)	(41,706)
Tenant origination and absorption cost	541,646	536,882
Tenant origination and absorption cost - accumulated amortization	(177,874)	(124,261)
Tenant origination and absorption cost, net	$ 363,772	$ 412,621