Real Estate - Leasing Costs For Next Five Years (Details) $ in Thousands	Sep. 30, 2016 USD ($)
In-place lease valuation, net
Remaining 2016	$ 488
2017	1,259
2018	249
2019	(1,663)
2020	(839)
Tenant origination and absorption costs
Remaining 2016	16,150
2017	61,380
2018	53,849
2019	44,762
2020	36,169
Ground leasehold improvements
Remaining 2016	7
2017	27
2018	27
2019	27
2020	27
Other leasing costs
Remaining 2016	233
2017	1,106
2018	1,579
2019	1,579
2020	$ 1,556