Other Assets, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Other Assets [Abstract]
Deferred leasing commissions and costs	$ 40,172	$ 38,738
Deferred financing expenses	13,971	13,971
Office equipment, ROU assets, and other	21,222	19,430
Corporate intangible assets	4,883	4,883
Total depreciable and amortizable assets	80,248	77,022
Accumulated depreciation and amortization	(40,706)	(35,055)
Net depreciable and amortizable assets	39,542	41,967
Accounts Receivable, net	53,265	46,125
Accounts receivable - affiliates	935	728
Deferred rent receivable, net	30,542	29,291
Derivative assets	0	2,728
Prepaid expenses and other	10,990	7,851
Total other assets, net	135,274	128,690
Uncollectable lease receivables, general reserves	5,700	6,900
Lease billings, nonaccrual basis	$ 19,400	$ 6,900