Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 28, 2018	Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Activity in accumulated other comprehensive loss
Balance	$ 612,181	$ 612,181
Balance		682,508	$ 612,181
Amount of pension termination charge reclassified from AOCI		23,807
Pension termination charge		28,200
Income tax expense		4,400
Components of non-controlling interest
Balance as of the beginning of the period	13,035	13,035	11,186	$ 10,070
Net income		1,567	729	1,062
Other comprehensive income (loss)		(134)	1,120	54
Balance as of the end of the period		14,468	13,035	11,186
Accumulated Other Comprehensive Income (Loss)
Activity in accumulated other comprehensive loss
Balance	(25,199)	(25,199)	(32,883)	(34,000)
Changes before reclassifications		(2,856)	7,580	(2,778)
Cumulative effect adjustment		(1,637)
Amounts reclassified to net income		26,858	1,713	4,879
Tax effect		(628)	(1,609)	(984)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated		21,737	7,684	1,117
Balance		(3,462)	(25,199)	(32,883)
Accumulated Other Comprehensive Income (Loss) | ASU 2016-01 - Investments
Activity in accumulated other comprehensive loss
Cumulative effect adjustment		(1,637)
Cumulative effect adjustment - unrealized gains on equity investments	(2,100)
Cumulative effect adjustment - tax expense	(500)
Translation Adjustment
Activity in accumulated other comprehensive loss
Balance	2,388	2,388	(927)	(445)
Changes before reclassifications		(2,338)	3,315	(482)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated		(2,338)	3,315	(482)
Balance		50	2,388	(927)
Change in Fair Value of Cash Flow Hedge
Activity in accumulated other comprehensive loss
Balance	154	154	74	(286)
Changes before reclassifications		(369)	164	(1,478)
Amounts reclassified to net income		280	(208)	2,060
Tax effect		22	124	(222)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated		(67)	80	360
Balance		87	154	74
Unrealized Gain on Marketable Securities
Activity in accumulated other comprehensive loss
Balance	1,376	1,376	1,752	1,058
Changes before reclassifications		330	844	1,592
Cumulative effect adjustment		(1,637)
Amounts reclassified to net income		25	(1,420)	(471)
Tax effect		(88)	200	(427)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated		(1,370)	(376)	694
Balance		6	1,376	1,752
Net Pension Amortization and Net Actuarial Gain (Loss)
Activity in accumulated other comprehensive loss
Balance	$ (29,117)	(29,117)	(33,782)	(34,327)
Changes before reclassifications		(479)	3,257	(2,410)
Amounts reclassified to net income		26,553	3,341	3,290
Tax effect		(562)	(1,933)	(335)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated		25,512	4,665	545
Balance		$ (3,605)	$ (29,117)	$ (33,782)