v2.4.0.8
Goodwill (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Goodwill Line Items        
Goodwill impairment $ 3,552 $ 0 $ 3,552 $ 0
Opta Minerals Inc [Member]
       
Goodwill Line Items        
Goodwill impairment     $ 3,552  
Projected long-term annual operating income growth     2.50%  
Fair Value Inputs Discount Rate     14.00%  
Estimated Cumulative Average Operating Income Growth     25.70%