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Description of Business and Summary of Significant Accounting Policies, Cash and Cash Equivalents (Details) | 12 Months Ended
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Dec. 31, 2020
Cash and Cash Equivalents [Abstract] |
Settlement period for credit and debit card transactions | 5 days

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- Definition Period of time in which amounts due from third-party financial institutions for credit and debit card transactions are settled, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | hvt_SettlementPeriodForCreditAndDebitCardTransactions
Namespace Prefix: | hvt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration