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Notes Receivable - Notes Receivable Activity (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Notes receivable activities    
Advances under notes receivable $ 611 $ 7,766
Principal payments received under notes receivable (2,163) (49)
Reclassified to lease incentives (300) (200)
Notes receivable reserve (18) 75
Total $ (1,834) $ 7,442