Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Intangible Assets
In-place leases, net of accumulated amortization of $94,141 and $88,035 in 2016 and 2015, respectively	$ 95,101	$ 112,937
Above-market tenant leases, net of accumulated amortization of $15,187 and $15,423 in 2016 and 2015, respectively	6,288	8,031
Goodwill	3,626	3,647	$ 3,740	$ 3,867
Intangible Assets, Net (Including Goodwill)	105,015	124,615
In-place leases accumulated amortization	103,352	88,035
Above-market tenant leases accumulated amortization	$ 7,327	$ 15,423