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VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
|  | For the years ended December 31, 2018, 2017 and 2016 |
(in thousands) |  | Balance at Beginning of Period |  |  | Charged to Costs and Expenses |  |  | Net (Deductions) Recoveries |  |  | Balance at End of Period |
Year ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 4,471 |  |  | $ | 588 |  |  | $ | (246 | )(1) |  | $ | 4,813 |
Deferred tax asset valuation allowance |  | $ | 3,994 |  |  | $ | — | (2) |  | $ | (3,549 | ) |  | $ | 445 |
Reserve for obsolete or slow moving inventory |  | $ | 3,875 |  |  | $ | 8,088 |  |  | $ | (1,794 | )(3) |  | $ | 10,169 |
Year ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 2,553 |  |  | $ | 1,441 |  |  | $ | 477 | (1) |  | $ | 4,471 |
Deferred tax asset valuation allowance |  | $ | 356 |  |  | $ | 3,638 | (2) |  | $ | — |  |  | $ | 3,994 |
Reserve for obsolete or slow moving inventory |  | $ | 3,052 |  |  | $ | 5,869 |  |  | $ | (5,046 | )(3) |  | $ | 3,875 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 10,605 |  |  | $ | 6,021 |  |  | $ | (14,073 | )(1) |  | $ | 2,553 |
Deferred tax asset valuation allowance |  | $ | 276 |  |  | $ | 80 | (2) |  | $ | — |  |  | $ | 356 |
Reserve for obsolete or slow moving inventory |  | $ | 2,588 |  |  | $ | 6,401 |  |  | $ | (5,937 | )(3) |  | $ | 3,052 |
| (1) | Net (deductions) recoveries in the allowance for doubtful accounts principally reflect the write-off of previously reserved accounts net of recoveries.
| (2) | The valuation allowance for deferred tax assets is increased or decreased each year to reflect the state net operating losses, foreign tax credits and capital losses that management believes will not be utilized before they expire.
| (3) | Net (deductions) recoveries in the reserve for obsolete or slow moving inventory principally reflect the write-off and/ or disposal of previously reserved inventory.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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