Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Oct. 27, 2018	Apr. 28, 2018	Oct. 28, 2017
Goodwill	$ 53,982	$ 49,282	$ 362,412
Property, Plant and Equipment, Net	112,029	111,287	115,734
Intangible Assets, Net (Excluding Goodwill)	213,886	219,129	229,498
Liabilities, Current	613,356	$ 413,465	$ 643,116
Deferred Tax Asset Current [Member]
Liabilities, Noncurrent	40,425
Liabilities, Current	13,369
MBS [Member]
Goodwill	49,282
BNC [Member]
Goodwill	0
DSS [Member]
Goodwill	$ 4,700