v3.8.0.1

ACCOUNTS RECEIVABLE AND RELATED ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016
Accounts Receivable, Net [Abstract] |  |  |  |  |
Accounts receivable |  |  |  | $ 346,264 | $ 94,309
Allowance for doubtful accounts | $ 2,137 | $ 2,134 | $ (2,449) | 3,885 | 2,137
Allowance for doubtful accounts and sales reserves |  |  |  | (4,275) | (2,137)
Accounts receivable, net of allowance for doubtful accounts |  |  |  | $ 341,989 | $ 92,172
Allowance for doubtful accounts |  |  |  |  |
Allowance for doubtful accounts | (2,137) | (2,134) | 2,449 |  |
Additions Charged to Costs and Expenses | 3,715 | 1,330 | 1,553 |  |
Deduction From Reserves | (1,967) | (1,327) | (1,868) |  |
Allowance for doubtful accounts | (3,885) | (2,137) | $ (2,134) |  |
Allowance for Sales Reserves |  |  |  |  |
Allowance for Sales Reserve | 0 |  |  |  |
Sales Reserve Expense | 390 |  |  |  |
Reduction in Sales Reseve | 0 |  |  |  |
Allowance for Sales Reserve | $ 390 | $ 0 |  |  |

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