Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 18, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle
Credit allowance percentage						2.88%
Net investments in leases	$ 13,009,966		$ 13,009,966			$ 10,424,883
Change in allowance for credit losses	177,052	$ 0	261,080	$ 0
Financial receivable, allowance for credit loss, increase in current acquisition	22,200		22,200
Investments in leases - sales-type and direct financing, net
New Accounting Pronouncements or Change in Accounting Principle
Net investments in leases	13,009,966		13,009,966				$ 10,734,245
Investments in leases - financing receivables, net
New Accounting Pronouncements or Change in Accounting Principle
Notes receivable	2,693,257		2,693,257			0
Allowance for credit losses	93,029		93,029			0
Investments in loans, net
New Accounting Pronouncements or Change in Accounting Principle
Notes receivable	536,874		536,874			0
Allowance for credit losses	3,161		3,161			0
Investments in loans, net | Forum Convention Center Borrower
New Accounting Pronouncements or Change in Accounting Principle
Notes receivable					$ 400,000
MTA Property Acquisitions | Investments in leases - financing receivables, net
New Accounting Pronouncements or Change in Accounting Principle
Notes receivable	1,800,000		1,800,000
Caesars Properties | Investments in leases - sales-type and direct financing, net
New Accounting Pronouncements or Change in Accounting Principle
Non-cash increase in lease modification	333,400		333,400
Las Vegas Additional Properties | Investments in leases - sales-type and direct financing, net
New Accounting Pronouncements or Change in Accounting Principle
Net investments in leases	$ 1,400,000		$ 1,400,000
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Allowance for credit losses						$ 309,400
Credit allowance percentage						2.88%