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Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Apr. 25, 2015 | Apr. 26, 2014 | Apr. 27, 2013
Numerator (basic and diluted): |  |  |
Net income attributable to La-Z-Boy Incorporated | $ 70,773 us-gaap_NetIncomeLoss | $ 55,056 us-gaap_NetIncomeLoss | $ 46,389 us-gaap_NetIncomeLoss
Income allocated to participating securities, basic | (395)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | (422)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic | (639)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic
Income allocated to participating securities, diluted | (395)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted | (422)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted | (639)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted
Net income available to common shareholders, basic | 70,378 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 54,634 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 45,750 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net income available to common shareholders, diluted | $ 70,378 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 54,634 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 45,750 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Denominator |  |  |
Basic weighted average common shares outstanding (in shares) | 51,767,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 52,386,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 52,351,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Add: |  |  |
Contingent common shares | 250,000 us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares | 1,049,000 us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares | 812,000 us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares
Stock option dilution | 329,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 394,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 522,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted weighted average common shares outstanding (in shares) | 52,346,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 53,829,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 53,685,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Outstanding options |  |  |
Anti-dilutive options |  |  |
Outstanding options excluded from diluted share calculation (in shares) |  |  | 200,000 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockOptionMember
Weighted average exercise price of options excluded from diluted share calculation (in dollars per share) |  |  | $ 20.74 lzb_AntidilutiveOptionsExcludedFromComputationOfEarningsPerShareWeightedAverageExercisePrice / us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis = us-gaap_StockOptionMember

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