Leases - Schedule of Rental Revenues (Parenthetical) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Disaggregation Of Revenue [Abstract]
Non-cash write-offs, primarily for straight-line rent receivables	$ 11,309,000	$ 11,309,000
Uncollectible accounts receivable	$ 2,051,000	$ 2,051,000