Acquisitions Pleasant Prairie Intangible Assets (Details) (Plesant Prairie [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Apr. 15, 2013	Dec. 28, 2012
Business Acquisition [Line Items]
Useful Life	15 years
Intangible Assets Other Than Goodwill Deductible for Tax Purposes			$ 16,056
Intangible Assets Other Than Goodwill		16,056
Goodwill [Member]
Business Acquisition [Line Items]
Goodwill Deductible for Tax Purposes			14,291
Useful Life	15 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Useful Life	13 years
Intangible Assets Other Than Goodwill			13,462
Trade Name, Finite Intangible Asset [Member]
Business Acquisition [Line Items]
Useful Life	15 years
Intangible Assets Other Than Goodwill			1,850
Noncompete Agreements [Member]
Business Acquisition [Line Items]
Useful Life	2 years
Intangible Assets Other Than Goodwill			$ 744