Acquisition (Narrative) (Details) (Delta Egg Farm, LLC [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 01, 2014	Mar. 01, 2014
Business Acquisition [Line Items]
Acquisition date	Mar. 01, 2014
Percentage of voting interest acquired	50.00%	50.00%
Purchase price	$ 17.0
Previous ownership interest of purchase	50.00%	50.00%
Non-recurring, non-cash gain for excess purchase price over carrying value	4.0
Reduction in tax expense		(1.5)
Decrease in deferred tax liability	$ (3.7)	$ (3.7)
Delta, Utah [Member]
Business Acquisition [Line Items]
Number of laying hens	1,200,000
Chase, Kansas [Member]
Business Acquisition [Line Items]
Number of laying hens	400,000