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Net Income Attributable to Shareholders of Crawford & Company per Common Share - Schedule of Shares Issued and Included in Weighted-average Common Shares used to Compute Basic and Diluted Earnings per Share (Details) - Class A Non-Voting - shares shares in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
CRD-A Issued under the Non-Employee Director Stock Plan |  |  |  |
Share-based Compensation Arrangement |  |  |  |
Shares issued repurchased activity | 5 | 0 | 99 | 67
CRD-A Issued under the U.K. ShareSave Scheme |  |  |  |
Share-based Compensation Arrangement |  |  |  |
Shares issued repurchased activity | 0 | 5 | 0 | 70
CRD-A issued under the Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement |  |  |  |
Shares issued repurchased activity | 124 | 159 | 124 | 159
CRD-A Issued under the 2016 Omnibus Stock and Incentive Plan |  |  |  |
Share-based Compensation Arrangement |  |  |  |
Shares issued repurchased activity | 0 | 0 | (6) | 0

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