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Stock-Based Compensation, SARs (Details) (USD $) | 12 Months Ended
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Apr. 25, 2015 | Apr. 26, 2014 | Apr. 27, 2013
Stock-Based Compensation |  |  |
Expense recognized | $ 11,377,000 us-gaap_AllocatedShareBasedCompensationExpense | $ 14,475,000 us-gaap_AllocatedShareBasedCompensationExpense | $ 13,628,000 us-gaap_AllocatedShareBasedCompensationExpense
Stock Appreciation Rights |  |  |
Stock-Based Compensation |  |  |
Percentage vesting each year from date of grant | 25.00%lzb_PercentagesOfShareBasedPaymentAwardExercisableVestingInEachYearFromDateOfGrant / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Period from grant date for first vesting | 1 year |  |
Vesting period | 4 years |  |
Unrecognized compensation cost | 700,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Period for recognition of unrecognized compensation costs | 1 year 3 months 18 days |  |
Stock Appreciation Rights | Fiscal 2014 Grant |  |  |
Fair value assumptions |  |  |
Risk-free interest rate (as a percent) | 1.02%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2014Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Dividend rate (as a percent) | 1.16%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2014Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Expected life in years | 3 years 2 months 12 days |  |
Stock price volatility (as a percent) | 34.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2014Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Fair value per share (in dollars per share) | $ 10.24 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2014Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Stock Appreciation Rights | Fiscal 2013 Grant |  |  |
Fair value assumptions |  |  |
Risk-free interest rate (as a percent) | 0.64%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2013Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Dividend rate (as a percent) | 1.16%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2013Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Expected life in years | 2 years 2 months 12 days |  |
Stock price volatility (as a percent) | 30.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2013Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Fair value per share (in dollars per share) | $ 15.09 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue / us-gaap_AwardDateAxis = lzb_AwardsGrantedDuring2013Member / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |  |
Stock Appreciation Rights | Selling, General and Administrative Expense |  |  |
Stock-Based Compensation |  |  |
Expense recognized | $ 700,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember | $ 1,100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember | $ 600,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember

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- Definition Period from date of grant for first vesting of the award. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Per share weighted average intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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