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Accounts Payable and Accrued Expenses (Accounts Payable and Accrued Expenses) (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Accounts Payable and Accrued Liabilities [Abstract] |  |
Trade payables and accrued expenses | $ 70,894 | $ 36,092
OPTAVIA Coach compensation payable | 28,733 | 22,598
Dividends payable | 17,186 | 13,831
Accrued payroll and related taxes | 24,940 | 16,948
Promotional sales incentive accruals | 10,935 | 7,621
Deferred revenue | 8,050 | 7,606
Sales tax payable | 2,571 | 2,981
Total | $ 163,309 | $ 107,677

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