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Notes Receivable - Notes Receivable Activity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Notes receivable activities    
Advances under notes receivable $ 141 $ 6,953
Principal payments received under notes receivable   (41)
Reclassified to lease incentives (300)  
Notes receivable reserve (1) 69
Total $ (158) $ 6,843