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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Sep. 28, 2014
Sep. 29, 2013
Statement of Comprehensive Income [Abstract]        
Gain (loss) associated with available-for-sale securities, tax $ (10) $ 0 $ (30) $ 0
Gain (loss) associated with pension and other postretirement benefits, tax $ 396 $ 0 $ 6,105 $ 0