XML 34 R28.htm IDEA: XBRL DOCUMENT v2.4.0.8
Effect of Derivative Instruments on Consolidated Statements of Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2013
Sep. 28, 2012
Sep. 27, 2013
Sep. 28, 2012
Derivative Instruments, Gain (Loss) [Line Items]        
Operating expenses $ (34,522) $ (25,052) $ (96,701) $ (67,997)
Commodity | Derivatives not designated as hedging instruments
       
Derivative Instruments, Gain (Loss) [Line Items]        
Operating expenses       $ (17)