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Accounts Receivable (Tables) | 9 Months Ended
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Sep. 30, 2021
Receivables [Abstract] |
Schedule of Activity Related to the Allowance for Doubtful Accounts | The activity related to the allowance for doubtful accounts for the periods presented was as follows:
|  | Three months ended September 30, |  | Nine months ended September 30,
(in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Balance at beginning of period |  | $ | 7,334 |  |  | $ | 7,743 |  |  | $ | 7,698 |  |  | $ | 5,338 |
Bad debt expense |  | 626 |  |  | 113 |  |  | 324 |  |  | 2,821 |
Amount of receivables written off |  | (224) |  |  | (61) |  |  | (268) |  |  | (335) |
Foreign currency translation and other |  | (74) |  |  | 139 |  |  | (92) |  |  | 110 |
Balance at end of period |  | $ | 7,662 |  |  | $ | 7,934 |  |  | $ | 7,662 |  |  | $ | 7,934 |

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- References No definition available. + Details
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