Summary of Significant Accounting Policies - Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets:
Acquired real estate leases and other intangibles, net	$ 325,845	$ 378,218
Intangible assets, net	325,845	378,546
Liabilities:
Intangible liabilities, net	$ 2,107	4,509
Amortization period of intangible liabilities	3 years
Amortization period of intangible assets	6 years
Amortization relating to intangible assets	$ 52,264	1,757	$ 2,542
Amortization relating to intangible liabilities	2,403	441	$ 455
Tradenames and trademarks
Assets:
Tradenames and trademarks	89,375	89,375
Above market operating leases, net of accumulated amortization of $55,220 and $15,748, respectively
Assets:
Acquired real estate leases and other intangibles, net	224,510	275,814
Intangible assets, accumulated amortization	55,220	15,748
Below market ground leases, net of accumulated amortization of $16,226 and $21,125, respectively
Assets:
Acquired real estate leases and other intangibles, net	8,934	10,034
Intangible assets, accumulated amortization	16,226	21,125
Other, net of accumulated amortization of $1,188 and $1,803, respectively
Assets:
Acquired real estate leases and other intangibles, net	3,026	3,323
Intangible assets, accumulated amortization	1,188	1,803
Below market operating leases, net of accumulated amortization of $559 and $367, respectively
Liabilities:
Intangible liabilities, net	1,691	3,653
Intangible liabilities, accumulated amortization	559	367
Above market ground leases, net of accumulated amortization of $6,180 and $5,886, respectively
Liabilities:
Intangible liabilities, net	416	856
Intangible liabilities, accumulated amortization	$ 6,180	$ 5,886
Above Market Leases
Liabilities:
Amortization period of above and below market leases	7 years
Below Market Leases
Liabilities:
Amortization period of above and below market leases	5 years 1 month 6 days