Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
2017 (six months remaining)	$ 6,595
2018	11,754
2019	10,536
2020	8,457
2021	5,971
Thereafter	16,097
Intangible Assets, net	59,410	$ 72,478
Liabilities
2017 (six months remaining)	1,193
2018	2,196
2019	1,885
2020	1,337
2021	807
Thereafter	8,571
Acquired Lease Intangibles, Net	$ 15,989	$ 18,119