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Lessor Leases - Income Recognized from Operating Leases (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Rental income $ 2,474 $ 2,863 $ 8,278 $ 8,864