Earnings per Share - Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 25, 2020	Jan. 26, 2019	Jan. 25, 2020	Jan. 26, 2019
Numerator (basic and diluted):
Net income attributable to La-Z-Boy Incorporated	$ 34,512	$ 28,731	$ 75,174	$ 67,046
Income allocated to participating securities	(45)	(92)	(121)	(231)
Net income available to common Shareholders	$ 34,467	$ 28,639	$ 75,053	$ 66,815
Denominator:
Basic weighted average common shares outstanding (in shares)	46,262	46,820	46,545	46,808
Add:
Contingent common shares (in shares)	148	131	147	135
Stock option dilution (in shares)	174	140	175	269
Diluted weighted average common shares outstanding (in shares)	46,584	47,091	46,867	47,212
Basic (in dollars per share)	$ 0.75	$ 0.61	$ 1.61	$ 1.43
Diluted (in dollars per share)	$ 0.74	$ 0.61	$ 1.60	$ 1.42