Earnings per Share - Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 23, 2021	Jan. 25, 2020	Jan. 23, 2021	Jan. 25, 2020
Numerator (basic and diluted):
Net income attributable to La-Z-Boy Incorporated	$ 29,232	$ 34,512	$ 68,965	$ 75,174
Income allocated to participating securities	(9)	(45)	(33)	(121)
Net income available to common Shareholders	$ 29,223	$ 34,467	$ 68,932	$ 75,053
Denominator:
Basic weighted average common shares outstanding (in shares)	46,261	46,262	46,064	46,545
Add:
Contingent common shares (in shares)	224	148	195	147
Stock option dilution (in shares)	333	174	148	175
Diluted weighted average common shares outstanding (in shares)	46,818	46,584	46,407	46,867
Basic (in dollars per share)	$ 0.63	$ 0.75	$ 1.50	$ 1.61
Diluted (in dollars per share)	$ 0.62	$ 0.74	$ 1.49	$ 1.60