v2.4.0.6
Significant Accounting Policies (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Representatives
Dec. 31, 2011
Dec. 31, 2010
Significant Accounting Policies (Textual) [Abstract]      
Number of manufactures representatives 31    
Percentage of copper rod purchase 79.00% 86.10% 81.10%
Percentage of aluminum rod purchase 2.00%    
Shipping and handling cost $ 20.1 $ 18.4 $ 15.1
Financial instruments measured at fair value on a recurring basis 0 0  
Fair value of cash equivalents $ 33.9 $ 112.3  
Buildings and improvements [Member] | Minimum [Member]
     
Property Plant And Equipment [Line Items]      
Property Plant And Equipment 15 years    
Buildings and improvements [Member] | Maximum [Member]
     
Property Plant And Equipment [Line Items]      
Property Plant And Equipment 39 years    
Machinery and Equipment[Member] | Minimum [Member]
     
Property Plant And Equipment [Line Items]      
Property Plant And Equipment 3 years    
Machinery and Equipment[Member] | Maximum [Member]
     
Property Plant And Equipment [Line Items]      
Property Plant And Equipment 15 years    
Furniture and Fixtures [Member] | Minimum [Member]
     
Property Plant And Equipment [Line Items]      
Property Plant And Equipment 3 years    
Furniture and Fixtures [Member] | Maximum [Member]
     
Property Plant And Equipment [Line Items]      
Property Plant And Equipment 15 years