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Acquisitions (Wolverine Narrative) (Details) (USD $)
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Wolverine
Apr. 16, 2013
Wolverine
Apr. 16, 2013
Wolverine Joining
Dec. 31, 2013
Wolverine Joining
Dec. 31, 2013
Wolverine and Wolverine Joining
Apr. 16, 2013
Wolverine and Wolverine Joining
Apr. 16, 2013
Trade Names
Wolverine and Wolverine Joining
Apr. 16, 2013
Customer Relationships
Wolverine and Wolverine Joining
Business Acquisition [Line Items]                
Acquisition purchase price   $ 59,700,000            
Final working capital and other adjustments     300,000          
Employee severance charges       400,000        
Goodwill           14,767,000    
Intangible assets acquired           13,657,000 4,600,000 9,000,000
Useful lives         20 years      
Sales 43,300,000              
Operating income 1,600,000              
Intercompany sales 3,500,000              
Acquisition-related costs         600,000      
Fair value adjustment         $ 500,000