Other Assets, Net Summary of Other Assets, Net (Details) - USD ($)	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred leasing costs, net	$ 141,894,000		$ 129,601,000
Lease intangible assets, net	29,079,000		34,390,000
Other identified intangible assets, net	51,832,000	$ 767,000	55,469,000
Operating right-of-use assets, net (1)	32,949,000	35,300,000	0
Prepaid expenses	9,190,000	$ 140,000	6,482,000
Deferred financing costs on credit facility, net	3,881,000		4,806,000
Deposits	11,104,000		3,633,000
Derivative agreements, at fair value	79,000		10,383,000
Other	16,908,000		20,230,000
Total other assets, net	$ 296,916,000		$ 264,994,000