Other Liabilities, Net Summary of Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Schedule of Other Liabilities [Line Items]
Lease intangible liabilities, net	$ 12,243		$ 14,098
Prepaid rent	25,810		21,998
Lease assumption liabilities	21,856		23,105
Lease incentive liabilities	26,317		9,317
Lease liabilities related to operating right-of-use assets (1)	34,540		0
Finance lease liability	15,601		15,704
Security deposits	16,573		17,696
Environmental liabilities	17,898		17,898
Ground lease deferred rent payable	0	$ 3,500	3,510
Deferred tax liability	6,250		6,878
Dividends payable	0		45,193
Derivative agreements, at fair value	27,577		1,723
Other	1,040		4,486
Total other liabilities, net	$ 205,705		$ 181,606