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Goodwill and Other Intangible Assets - Additional Information (Detail) - Consulting [Member] $ in Thousands | 6 Months Ended
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Jun. 30, 2021 USD ($)
Goodwill [Line Items] |
Accumulated goodwill impairment losses | $ 0
Goodwill impairment charges | 0
Goodwill allocated to reporting unit | $ 8,300

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