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Notes Receivable - Notes Receivable Activity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Notes receivable activities    
Advances under notes receivable $ 1,656 $ 141
Principal payments received under notes receivable (2,553)  
Reclassified to lease incentives   (300)
Notes receivable loan loss reserve 9 1
Net decrease $ (888) $ (158)