Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Oct. 27, 2018	Jul. 28, 2018	Oct. 28, 2017	Oct. 27, 2018	Oct. 28, 2017
Activity in accumulated other comprehensive loss
Balance		$ 612,181		$ 612,181
Balance	$ 635,820			635,820
Components of non-controlling interest
Balance as of the beginning of the period	12,455	13,035	$ 11,684	13,035	$ 11,186
Net income	337		310	985	403
Other comprehensive income (loss)	619		100	(609)	505
Balance as of the end of the period	13,411	12,455	12,094	13,411	12,094
Accumulated Other Comprehensive Income (Loss)
Activity in accumulated other comprehensive loss
Balance	(29,573)	(25,199)	(30,248)	(25,199)	(32,883)
Changes before reclassifications	719		(997)	(2,678)	2,163
Amounts reclassified to net income	751		725	1,485	645
Tax effect	(226)		9	(300)	(436)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	1,244		(263)	(3,130)	2,372
Balance	(28,329)	(29,573)	(30,511)	(28,329)	(30,511)
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	(573)	2,388	984	2,388	(927)
Changes before reclassifications	549		(247)	(2,412)	1,664
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	549		(247)	(2,412)	1,664
Balance	(24)	(573)	737	(24)	737
Change in Fair Value of Cash Flow Hedge
Activity in accumulated other comprehensive loss
Balance	(179)	154	552	154	74
Changes before reclassifications	140		(1,094)	(369)	(239)
Amounts reclassified to net income	65		(103)	132	(186)
Tax effect	(50)		456	59	162
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	155		(741)	(178)	(263)
Balance	(24)	(179)	(189)	(24)	(189)
Unrealized Gain (Loss) on Marketable Securities
Activity in accumulated other comprehensive loss
Balance	(220)	1,376	1,481	1,376	1,752
Changes before reclassifications	30		344	103	738
Amounts reclassified to net income			(8)	(19)	(840)
Tax effect	(7)		(128)	(20)	39
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	23		208	(1,573)	(63)
Balance	(197)	(220)	1,689	(197)	1,689
Unrealized Gain (Loss) on Marketable Securities | 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)
Net Pension Amortization and Net Actuarial Loss
Activity in accumulated other comprehensive loss
Balance	(28,601)	(29,117)	(33,265)	(29,117)	(33,782)
Amounts reclassified to net income	686		836	1,372	1,671
Tax effect	(169)		(319)	(339)	(637)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	517		517	1,033	1,034
Balance	$ (28,084)	$ (28,601)	$ (32,748)	$ (28,084)	$ (32,748)