Leases - Schedule of Rental Revenues (Parenthetical) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Disaggregation Of Revenue [Abstract]
Non-cash write-offs, primarily for straight-line rent receivables	$ 14,863,000	$ 26,172,000
Uncollectible accounts receivable		$ 2,051,000