Earnings per Share - Reconciliation (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 27, 2018	Oct. 28, 2017	Oct. 27, 2018	Oct. 28, 2017
Numerator (basic and diluted):
Net income attributable to La-Z-Boy Incorporated	$ 20,012	$ 22,896	$ 38,315	$ 34,547
Income allocated to participating securities, basic	(63)	(117)	(139)	(172)
Income allocated to participating securities, diluted	(63)	(117)	(139)	(172)
Net income available to common shareholders, basic	19,949	22,779	38,176	34,375
Net income available to common shareholders, diluted	$ 19,949	$ 22,779	$ 38,176	$ 34,375
Denominator:
Basic weighted average common shares outstanding (in shares)	46,888	47,964	46,802	48,160
Add:
Contingent common shares (in shares)	85	96	85	99
Stock option dilution (in shares)	286	237	332	278
Diluted weighted average common shares outstanding (in shares)	47,259	48,297	47,219	48,537