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Value Creation Plan (Exiting Flexible Resealable Pouch and Nutrition Bar Product Lines and Operations) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Restructuring Cost and Reserve [Line Items]    
Revenues $ 312,652 $ 330,031
Earnings (loss) from continuing operations before income taxes $ (6,155) (16,153)
Nutrition Bar [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring and Related Cost, Description For the quarter ended March 31, 2018, the loss before income taxes from these operations included the recognition of the remaining lease obligation of $1.3 million related to the vacated nutrition bar processing facility. These operations are included in the Consumer Products operating segment.  
Flexible Resealable Pouch and Nutrition Bar [Member]    
Restructuring Cost and Reserve [Line Items]    
Revenues $ 2,600 15,400
Earnings (loss) from continuing operations before income taxes $ (1,300) $ (2,000)