Identified Intangible Assets and Liabilities - Schedule of Identified Intangible Assets and Intangible Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross amount	$ 129,421	$ 129,552
Accumulated amortization	(100,298)	(98,587)
Total, net	29,123	30,965
Identified intangible liabilities (included in deferred revenue):
Gross amount	315,930	316,119
Accumulated amortization	(266,714)	(262,580)
Total, net	$ 49,216	$ 53,539