Identified Intangible Assets and Liabilities - Schedule of Identified Intangible Assets and Intangible Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross amount	$ 129,552	$ 308,895
Accumulated amortization	(98,587)	(172,114)
Net	30,965	136,781
Identified intangible liabilities (included in deferred revenue):
Gross amount	316,119	503,373
Accumulated amortization	(262,580)	(341,779)
Net	$ 53,539	$ 161,594