Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
2017	$ 19,663
2018	11,754
2019	10,536
2020	8,457
2021	5,971
Thereafter	16,097
Intangible Assets, net	72,478	$ 111,623
Liabilities
2017	3,323
2018	2,196
2019	1,885
2020	1,337
2021	807
Thereafter	8,571
Acquired Lease Intangibles, Net	$ 18,119	$ 25,655