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Leases - Summary of Minimum and Contingent Operating Lease Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Minimum rental income	$ 3,913	$ 7,479	$ 6,117
Contingent rental income	1,840	1,527	1,335
Total rental income	$ 5,753	$ 9,006	$ 7,452