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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2021
Valuation And Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | PARSONS CORPORATION AND SUBSIDIARIES Schedule II—Valuation and Qualifying Accounts
Description |  | Balance at beginning of period |  |  | Additions |  |  | Deductions |  |  | Other and foreign exchange impact |  |  | Balance at end of period |
2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  |  | 4,001 |  |  |  | 8 |  |  |  | (54 | ) |  |  | - |  |  |  | 3,955 |
Valuation allowance on deferred tax assets |  |  | 23,878 |  |  |  | 4,873 |  |  |  | (878 | ) |  |  | (525 | ) |  |  | 27,348 |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  |  | 5,497 |  |  |  | 1,201 |  |  |  | (2,697 | ) |  |  | - |  |  |  | 4,001 |
Valuation allowance on deferred tax assets |  |  | 17,359 |  |  |  | 7,655 |  |  |  | (596 | ) |  |  | (540 | ) |  |  | 23,878 |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts (1) |  |  | 4,722 |  |  |  | 775 |  |  |  | - |  |  |  | - |  |  |  | 5,497 |
Valuation allowance on deferred tax assets |  |  | 6,668 |  |  |  | 10,817 |  |  |  | (32 | ) |  |  | (94 | ) |  |  | 17,359 |
(1) | In connection with the adoption of ASU 2016-13, we have modified the historical presentation of gross receivables and the allowance for doubtful accounts to reflect only expected credit losses in the allowance in conformity with the current period presentation.

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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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