CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Unearned ESOP Shares	Non-controlling Interests
Beginning Balance at Apr. 28, 2018	$ 1,461,790	$ 948	$ 103,776	$ (74,974)	$ 1,497,766	$ (65,726)	$ 0
Beginning Balance (in shares) at Apr. 28, 2018		94,756,000
Foreign currency translation	(9,320)			(9,320)
Cash flow hedges	549			549
Net income (loss)	(4,509)				(4,456)		(53)
Dividends declared	(24,327)				(24,327)
Common stock issued and related tax benefits	1,677	$ 1	1,676
Common stock issued and related tax benefits (in shares)		90,000
Stock based compensation	3,232		3,232
ESOP activity	14,004					14,004
Increase from asset acquisition	4,000						4,000
Ending Balance at Jul. 28, 2018	1,447,096	$ 949	108,684	(83,745)	1,468,983	(51,722)	3,947
Ending Balance (in shares) at Jul. 28, 2018		94,846,000
Foreign currency translation	(3,540)			(3,540)
Cash flow hedges	552			552
Net income (loss)	28,646				28,869		(223)
Dividends declared	(24,495)				(24,495)
Common stock issued and related tax benefits	1,035	$ 1	1,034
Common stock issued and related tax benefits (in shares)		104,000
Stock based compensation	6,394		6,394
Ending Balance at Oct. 27, 2018	1,455,688	$ 950	116,112	(86,733)	1,473,357	(51,722)	3,724
Ending Balance (in shares) at Oct. 27, 2018		94,950,000
Foreign currency translation	3,184			3,184
Cash flow hedges	548			548
Net income (loss)	31,054				31,225		(171)
Dividends declared	(24,528)				(24,528)
Common stock issued and related tax benefits	2,195	$ 2	2,193
Common stock issued and related tax benefits (in shares)		214,000
Stock based compensation	4,556		4,556
Ending Balance at Jan. 26, 2019	1,472,697	$ 952	122,861	(83,001)	1,480,054	(51,722)	3,553
Ending Balance (in shares) at Jan. 26, 2019		95,164,000
Foreign currency translation	(5,907)			(5,907)
Cash flow hedges	639			639
Net income (loss)	27,685				27,990		(305)
Dividends declared	(24,548)				(24,548)
Common stock issued and related tax benefits	3,097	$ 1	3,096
Common stock issued and related tax benefits (in shares)		108,000
Stock based compensation	5,503		5,503
ESOP activity	1,341					1,341
Ending Balance at Apr. 27, 2019	$ 1,480,507	$ 953	131,460	(88,269)	1,483,496	(50,381)	3,248
Ending Balance (in shares) at Apr. 27, 2019	95,272,000	95,272,000
Foreign currency translation	$ (3,799)			(3,799)
Cash flow hedges	554			554
Net income (loss)	29,807				30,042		(235)
Dividends declared	(24,856)				(24,856)
Common stock issued and related tax benefits	(5,369)	$ 2	(5,371)
Common stock issued and related tax benefits (in shares)		198,000
Stock based compensation	6,634		6,634
ESOP activity	18,452					18,452
Ending Balance at Jul. 27, 2019	$ 1,503,377	$ 955	$ 132,723	(94,221)	1,492,836	$ (31,929)	$ 3,013
Ending Balance (in shares) at Jul. 27, 2019	95,470,000	95,470,000
Adoption of ASU 2018-02 | ASU 2018-02	$ 2,707			$ (2,707)	2,707
Adoption of ASU 2016-02 | ASU 2016-02	$ 1,447				$ 1,447