Acquired Lease Intangibles (Details) - Intangible Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Assets acquired in place	$ 79,205	$ 66,942
Finite-Lived Intangible Assets, Net	79,205	66,942
Liabilities:
Below-market leases	190,321	155,169
Accumulated amortization	(35,363)	(30,308)
Acquired lease intangible liabilities, net	154,958	124,861
In-place leases
Assets:
Assets acquired in place	93,952	79,996
Accumulated amortization	(33,034)	(28,535)
Above-market leases
Assets:
Assets acquired in place	30,251	25,575
Accumulated amortization	$ (11,964)	$ (10,094)