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Lessor Leases - Income Recognized from Operating Leases (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Leases [Abstract]        
Rental income $ 3,193 $ 3,024 $ 5,804 $ 6,001