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Share-Based Compensation - Summary of Global Employee Stock Purchase Plan Activity (Detail) - HCM Global Employee Stock Purchase Plan [Member] - Common Stock [Member] | 3 Months Ended
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Mar. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares Issued | shares | 39,484
Purchase Price (per share) | $ / shares | $ 71.63

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