Other Assets, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Assets [Abstract]
Deferred leasing commissions and costs	$ 40,465	$ 38,738
Deferred financing expenses	13,971	13,971
Office equipment, ROU assets, and other	21,772	19,430
Corporate intangible assets	4,883	4,883
Total depreciable and amortizable assets	81,091	77,022
Accumulated depreciation and amortization	(43,565)	(35,055)
Net depreciable and amortizable assets	37,526	41,967
Accounts Receivable, net	50,384	46,125
Accounts receivable - affiliates	622	728
Deferred rent receivable	32,179	29,291
Derivative assets	0	2,728
Prepaid expenses and other	12,303	7,851
Total other assets, net	133,014	128,690
Uncollectable lease receivables, general reserves	7,100	6,900
Lease billings, nonaccrual basis	$ (23,400)	$ (6,900)