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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Condensed Consolidated Statements of Comprehensive Income        
Products, sales to affiliates $ 179,031 $ 164,548 $ 375,017 $ 347,083
Other comprehensive income (loss), income tax benefit $ 725 $ 2,939 $ 10,388 $ 5,540