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Accounts and Notes Receivable - Schedule of Accounts and Notes Receivable (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Short-term |  |
Accounts and notes receivable | $ 392,114 | $ 390,705
Allowance for doubtful accounts | (38,630) | (11,985)
Total net short-term accounts and notes receivable | 353,484 | 378,720
Long-term |  |
Notes receivable | 55,906 | 15,476
Allowance for doubtful accounts | (10,000) | 0
Total net long-term notes receivable | 45,906 | 15,476
Total net accounts and notes receivable | $ 399,390 | $ 394,196

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