Derivative Financial Instruments (Details) $ in Thousands	3 Months Ended
	Aug. 29, 2015 USD ($) T bu	May. 30, 2015 USD ($)
Derivatives, Fair Value [Line Items]
Derivative, fair value	$ 5	$ 82
Corn Commodity [Member]
Derivatives, Fair Value [Line Items]
Underlying, derivative volume | bu	985,000
Soybean Meal Commodity [Member]
Derivatives, Fair Value [Line Items]
Derivative, fair value	$ 5
Underlying, derivative mass | T	10,300
Maximum [Member]
Derivatives, Fair Value [Line Items]
Term of contract	6 months