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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for doubtful accounts receivable |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 19,617 | $ 28,756 | $ 27,678
Charged to Expenses | 9,464 | 4,200 | 9,868
Deductions | (6,827) | (7,906) | (8,687)
Translation Adjustments | (724) | (120) | (103)
Balance at End of Period | 21,530 | 19,617 | 28,756
Allowance for doubtful accounts receivable | Cumulative Effect, Period of Adoption, Adjusted Balance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period |  | 23,443 |
Balance at End of Period |  |  | 23,443
Deferred tax valuation allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 24,132 | 21,618 | 23,072
Charged to Expenses | 5,635 | 3,462 | 719
Deductions | (3,936) | (2,333) | (2,154)
Translation Adjustments | (1,633) | 1,385 | (19)
Balance at End of Period | $ 24,198 | $ 24,132 | $ 21,618

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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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