CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 30, 2012	Dec. 25, 2011	Dec. 26, 2010
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Unrealized net gain (loss) and other components of benefit plans, taxes	$ 88,622	$ 66,725	$ (4,940)
Other comprehensive income (loss), taxes	$ 528	$ 336	$ (35)

Tax effect, net of reclassification adjustments, of the change in accumulated other comprehensive income (loss) related to pension and other postretirement benefit plans, attributable to the parent entity.

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+ Details