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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (In thousands)
Description |  | Balance at Beginning of Period |  | Additions: Charged to Costs and Expenses |  | Deductions: Write-offs (1) and recoveries |  | Balance at End of Period
Year Ended December 31, 2020: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 12,701 |  |  | $ | 13,283 |  |  | $ | (9,966) |  |  | $ | 16,018 |
Deferred tax asset valuation allowance |  | $ | 608 |  |  | $ | 9,456 |  |  | $ | (1,757) |  |  | $ | 8,307 |
Year Ended December 31, 2019: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 10,422 |  |  | $ | 13,134 |  |  | $ | (10,855) |  |  | $ | 12,701 |
Deferred tax asset valuation allowance |  | $ | 44 |  |  | $ | 595 |  |  | $ | (31) |  |  | $ | 608 |
Year Ended December 31, 2018: |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 8,701 |  |  | $ | 17,338 |  |  | $ | (15,617) |  |  | $ | 10,422 |
Deferred tax asset valuation allowance |  | $ | 197 |  |  | $ | — |  |  | $ | (153) |  |  | $ | 44 |
______________________ (1) Represents specific amounts written off that were considered to be uncollectible.

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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=120395691&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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