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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Selected quarterly financial data [Abstract]
Net sales	$ 212,999us-gaap_SalesRevenueNet	$ 198,541us-gaap_SalesRevenueNet	$ 175,132us-gaap_SalesRevenueNet	$ 181,737us-gaap_SalesRevenueNet	$ 196,164us-gaap_SalesRevenueNet	$ 192,722us-gaap_SalesRevenueNet	$ 171,114us-gaap_SalesRevenueNet	$ 186,090us-gaap_SalesRevenueNet	$ 768,409us-gaap_SalesRevenueNet	$ 746,090us-gaap_SalesRevenueNet	$ 670,073us-gaap_SalesRevenueNet
Gross profit	114,156us-gaap_GrossProfit	106,203us-gaap_GrossProfit	94,144us-gaap_GrossProfit	97,862us-gaap_GrossProfit	106,000us-gaap_GrossProfit	103,877us-gaap_GrossProfit	91,311us-gaap_GrossProfit	100,309us-gaap_GrossProfit	412,366us-gaap_GrossProfit	401,496us-gaap_GrossProfit	352,035us-gaap_GrossProfit
Credit service charges	75us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	72us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	71us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	81us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	79us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	78us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	76us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	86us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	298us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	320us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard	293us-gaap_InterestAndFeeIncomeLoansConsumerInstallmentCreditCard
Income before taxes	(4,978)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	12,468us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7,812us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	9,956us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	15,783us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	15,388us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7,866us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	13,450us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	25,257us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	52,487us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23,516us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Net income	(10,192)us-gaap_NetIncomeLoss	7,824us-gaap_NetIncomeLoss	4,829us-gaap_NetIncomeLoss	6,129us-gaap_NetIncomeLoss	9,681us-gaap_NetIncomeLoss	9,494us-gaap_NetIncomeLoss	4,830us-gaap_NetIncomeLoss	8,260us-gaap_NetIncomeLoss	8,589us-gaap_NetIncomeLoss	32,265us-gaap_NetIncomeLoss	14,911us-gaap_NetIncomeLoss
Diluted net earnings (loss) per share [Abstract]
Benefit from release of reserve for the valuation allowance on deferred tax assets	21,600us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance			800us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance					0us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1,363us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1,207us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Per share impact of releasing the reserves for the valuation allowance (in dollars per share)	$ 0.90hvt_ReserveOfValuationAllowanceReservePerShareImpact			$ 0.02hvt_ReserveOfValuationAllowanceReservePerShareImpact
Common Stock [Member]
Basic net earnings (loss) per share [Abstract]
Common Stock (in dollars per share)	$ (0.45)us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.35us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.21us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.27us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.43us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.42us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.22us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.37us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.38us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 1.45us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.69us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Diluted net earnings (loss) per share [Abstract]
Common Stock (in dollars per share)	$ (0.45)us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.34us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.21us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.27us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.42us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.42us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.21us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.36us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.37us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 1.41us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember	$ 0.67us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Class A Common Stock [Member]
Selected quarterly financial data [Abstract]
Net income									$ 732us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 3,506us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 1,712us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Basic net earnings (loss) per share [Abstract]
Common Stock (in dollars per share)	$ (0.43)us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.33us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.20us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.26us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.41us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.40us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.20us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.35us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.33us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 1.37us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.58us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Diluted net earnings (loss) per share [Abstract]
Common Stock (in dollars per share)	$ (0.43)us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.33us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.20us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.26us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.41us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.40us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.20us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.34us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.33us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 1.35us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 0.59us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember

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