Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
2016 (three months remaining)	$ 7,113
2017	19,658
2018	11,753
2019	10,542
2020	8,456
Thereafter	23,685
Intangible Assets, net	81,207	$ 111,623
Liabilities
2016 (three months remaining)	1,613
2017	3,323
2018	2,196
2019	1,885
2020	1,337
Thereafter	9,377
Acquired Lease Intangibles, Net	$ 19,731	$ 25,655