Leases - Narrative (Details) ft² in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($) ft²	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2016 USD ($)
Leases [Line Items]
Decrease in income	$ 193,217,000	$ 322,906,000	$ 2,400,195,000	$ 181,488,000	$ 100,494,000	$ 190,645,000	$ 111,534,000	$ (17,841,000)	$ 3,097,806,000	$ 384,832,000	$ 162,017,000
Allowance for doubtful accounts	0				5,798,000				0	5,798,000	6,480,000		$ 8,621,000
Operating lease liabilities	498,254,000				0				498,254,000	0
Other liabilities	265,754,000				311,806,000				265,754,000	311,806,000
Deferred revenue	59,429,000				167,730,000				59,429,000	167,730,000
Identified intangible assets, net	30,965,000				136,781,000				30,965,000	136,781,000
Other assets	355,347,000				431,938,000				355,347,000	431,938,000
Operating lease, impairment loss									75,220,000	0	$ 0
Operating lease, right-of-use asset	$ 379,546,000				$ 0				379,546,000	$ 0
Accounting Standards Update 2016-02
Leases [Line Items]
Decrease in income									$ (17,237,000)
Operating lease liabilities												$ 526,866,000
Other liabilities												37,269,000
Deferred revenue												4,267,000
Identified intangible assets, net												23,665,000
Other assets												1,584,000
Operating lease, right-of-use asset												$ 526,866,000
Farley Office and Retail Building
Leases [Line Items]
Equity method ownership percentage	95.00%								95.00%
Square footage of real estate property (in sqft) | ft²	844								844
Lessee, operating lease, lease not yet commenced, term (years)	99 years								99 years
Lessee, operating lease, lease not yet commenced, rent expense									$ 5,000,000
PILOT payments	$ 556,852,000								$ 556,852,000
Farley Office and Retail Building | Office Space
Leases [Line Items]
Square footage of real estate property (in sqft) | ft²	730								730
Farley Office and Retail Building | Retail
Leases [Line Items]
Square footage of real estate property (in sqft) | ft²	114								114
608 Fifth Avenue
Leases [Line Items]
Operating lease liabilities	$ 71,582,000								$ 71,582,000
Operating lease, impairment loss			$ 75,220,000