Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 28, 2017	Jan. 23, 2016	Jan. 28, 2017	Jan. 23, 2016
Activity in accumulated other comprehensive loss
Balance			$ 547,142
Balance	$ 576,185		576,185
Components of non-controlling interest
Balance as of the beginning of the period	10,443	$ 9,318	10,070	$ 8,954
Net income	356	328	830	1,482
Other comprehensive loss	(58)	(132)	(159)	(922)
Balance as of the end of the period	10,741	9,514	10,741	9,514
Accumulated Other Comprehensive Loss
Activity in accumulated other comprehensive loss
Balance	(33,490)	(33,929)	(34,000)	(32,139)
Changes before reclassifications	(1,325)	(2,386)	(2,932)	(6,270)
Amounts reclassified to net income	1,084	1,101	3,656	3,625
Tax effect	(54)	550	(509)	120
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	(295)	(735)	215	(2,525)
Balance	(33,785)	(34,664)	(33,785)	(34,664)
Translation adjustment
Activity in accumulated other comprehensive loss
Balance	(673)	(971)	(445)	1,517
Changes before reclassifications	(383)	159	(611)	(2,329)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	(383)	159	(611)	(2,329)
Balance	(1,056)	(812)	(1,056)	(812)
Change in fair value of cash flow hedge
Activity in accumulated other comprehensive loss
Balance	(622)	(525)	(286)	(560)
Changes before reclassifications	(1,414)	(1,616)	(2,893)	(2,671)
Amounts reclassified to net income	762	560	1,698	1,672
Tax effect	248	403	455	381
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	(404)	(653)	(740)	(618)
Balance	(1,026)	(1,178)	(1,026)	(1,178)
Unrealized gain on marketable securities
Activity in accumulated other comprehensive loss
Balance	1,114	1,292	1,058	1,605
Changes before reclassifications	472	(929)	572	(1,270)
Amounts reclassified to net income	(500)	(248)	(509)	(413)
Tax effect	11	448	(24)	641
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	(17)	(729)	39	(1,042)
Balance	1,097	563	1,097	563
Net pension amortization and net actuarial loss
Activity in accumulated other comprehensive loss
Balance	(33,309)	(33,725)	(34,327)	(34,701)
Amounts reclassified to net income	822	789	2,467	2,366
Tax effect	(313)	(301)	(940)	(902)
Other comprehensive income (loss) attributable to La-Z-Boy Incorporated	509	488	1,527	1,464
Balance	$ (32,800)	$ (33,237)	$ (32,800)	$ (33,237)