Deferred Costs and Other Intangibles - Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Total	$ 52,493	$ 56,567
Deferred Leasing Costs
Finite-Lived Intangible Assets [Line Items]
Remaining 2016	2,682
2017	745
Total	3,427
Deferred Financing Costs
Finite-Lived Intangible Assets [Line Items]
Remaining 2016	1,515
2017	1,017
2018	519
2019	0
2020	0
Total	3,051
In-place lease values
Finite-Lived Intangible Assets [Line Items]
Remaining 2016	6,213
2017	1,435
2018	9
Total	7,657
Trademark
Finite-Lived Intangible Assets [Line Items]
Remaining 2016	330
2017	660
2018	92
Total	1,082
Database
Finite-Lived Intangible Assets [Line Items]
Remaining 2016	150
2017	300
2018	300
2019	300
2020	132
Total	$ 1,182