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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 WERNER ENTERPRISES, INC. VALUATION AND QUALIFYING ACCOUNTS
(In thousands) | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Write-offs (Recoveries) of Doubtful Accounts |  | Balance at End of Period
Year ended December 31, 2020: |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 7,921 |  |  | $ | 2,261 |  |  | $ | 1,496 |  |  | $ | 8,686 |
Year ended December 31, 2019: |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 8,613 |  |  | $ | 219 |  |  | $ | 911 |  |  | $ | 7,921 |
Year ended December 31, 2018: |  |  |  |  |  |  |
Allowance for doubtful accounts | $ | 8,250 |  |  | $ | 672 |  |  | $ | 309 |  |  | $ | 8,613 |
(In thousands) | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Write-offs (Recoveries) of Doubtful Accounts |  | Balance at End of Period
Year ended December 31, 2020: |  |  |  |  |  |  |
Allowance for doubtful student notes | $ | 21,317 |  |  | $ | 16,529 |  |  | $ | 18,398 |  |  | $ | 19,448 |
Year ended December 31, 2019: |  |  |  |  |  |  |
Allowance for doubtful student notes | $ | 19,361 |  |  | $ | 19,834 |  |  | $ | 17,878 |  |  | $ | 21,317 |
Year ended December 31, 2018: |  |  |  |  |  |  |
Allowance for doubtful student notes | $ | 21,026 |  |  | $ | 17,858 |  |  | $ | 19,523 |  |  | $ | 19,361 |
See report of independent registered public accounting firm.

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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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