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Leases - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Lessor, Lease, Description [Line Items]      
Property, plant and equipment, net $ 112,055 $ 112,055 $ 119,324
Operating lease income 282 602  
Variable lease income $ 100 $ 199  
Control Devices [Member]      
Lessor, Lease, Description [Line Items]      
Lessor, option to extend   until the time of the sale.