Selected Quarterly Financial Information (Unaudited) Selected Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	May 02, 2020	Jan. 25, 2020	Oct. 26, 2019	Jul. 27, 2019	Apr. 27, 2019	Jan. 26, 2019	Oct. 27, 2018	Jul. 28, 2018	May 02, 2020	Apr. 27, 2019	Apr. 28, 2018
Revenue, Net (Deprecated 2018-01-31)	$ 256,886	$ 502,292	$ 772,228	$ 319,657	$ 334,385	$ 548,008	$ 814,766	$ 337,484	$ 1,851,063	$ 2,034,643	$ 2,203,617
Gross Profit	65,407	118,535	186,950	71,657	117,403	132,953	210,760	66,610	442,549	527,726	557,233
Net Income (Loss) Attributable to Parent	$ (40,333)	$ (1,693)	$ 35,931	$ (32,155)	$ (46,218)	$ 769	$ 59,697	$ (38,622)	$ (38,250)	$ (24,374)	$ (252,566)
Earnings Per Share, Basic	$ (0.84)	$ (0.04)	$ 0.75	$ (0.68)	$ (0.97)	$ 0.02	$ 1.26	$ (0.82)	$ (0.80)	$ (0.52)	$ (5.40)
Earnings Per Share, Diluted	$ (0.84)	$ (0.04)	$ 0.74	$ (0.68)	$ (0.97)	$ 0.02	$ 1.25	$ (0.82)	$ (0.80)	$ (0.52)	$ (5.40)