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Contingencies and Commitments (Details Textual)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
claim
Dec. 31, 2014
USD ($)
Dec. 31, 2012
USD ($)
Contingencies And Commitments (Textual) [Abstract]      
Number of CBD cases pending | claim 1    
Proceeds from Legal Settlements $ 5.6 $ 4.0  
Insurance Claims      
Contingencies And Commitments (Textual) [Abstract]      
Physical inventory count pre-tax loss     $ 7.4
Proceeds from insurance settlement   $ 6.8  
Letter of Credit      
Contingencies And Commitments (Textual) [Abstract]      
Outstanding letters of credit $ 38.0