Intangibles - Future Aggregate Net Amortization of Acquired Lease Intangibles (Details 4) $ in Thousands	Jun. 30, 2017 USD ($)
Future aggregate net amortization of acquired lease intangibles (net decrease in revenue)
2017	$ (1,496)
2018	(2,899)
2019	(3,021)
2020	(3,159)
2021	(3,258)
Thereafter	(19,138)
Total	(32,971)
Future aggregate net amortization of acquired lease intangibles (net increase in expenses)
2017	19,513
2018	34,967
2019	30,833
2020	28,356
2021	24,256
Thereafter	119,030
Total	$ 256,955