Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 27, 2009	Dec. 25, 2011	Dec. 26, 2010	Sep. 26, 2009
Net income (loss)	$ 33,925	$ (495,690)	$ 90,326	$ (151,664)
Other comprehensive income (loss):
Unrealized holding gains (losses) on available-for-sale securities, net of tax	41	(1,160)	(226)	2,695
Recognition in earnings of a previously unrecognized gain on a derivative instrument designated as a cash flow hedge, net of tax	(139)	0	(2,565)	(357)
Gains associated with pension and other postretirement obligations, net of tax benefits, net of tax	69	(21,273)	6,420	(50,736)
Total other comprehensive income (loss), net of tax	(29)	(22,433)	3,629	(48,398)
Comprehensive income (loss)	33,896	(518,123)	93,955	(200,062)
Less: Comprehensive income (loss) attributable to noncontrolling interests	312	1,082	3,185	(82)
Comprehensive income (loss) attributable to Pilgrim's Pride Corporation	$ 33,584	$ (519,205)	$ 90,770	$ (199,980)