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Installment Receivable (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Installment Receivable |  |  |
Long-term installment receivable | $ 6,924 |  |
Revenue | 546,896 | $ 249,346 | $ 239,143
Interest income on capital lease transactions | 700 |  |
Predecessor |  |  |
Installment Receivable |  |  |
Installment receivable, current |  | 0 |
Capital lease revenue or maintenance revenue |  | $ 0 | $ 0
Maintenance |  |  |
Installment Receivable |  |  |
Revenue | 1,000 |  |
Sales type lease | Superior Transaction |  |  |
Installment Receivable |  |  |
Installment receivable, current | 3,700 |  |
Long-term installment receivable | $ 6,900 |  |

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