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Business Acquisitions - Narrative (Details)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 3 Months Ended
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Dec. 31, 2013
USD ($)
Mar. 31, 2013
Socomor [Member]
USD ($)
Mar. 31, 2013
Socomor [Member]
Customer Lists [Member]
Jun. 30, 2013
Tin Plating [Member]
USD ($)
Jun. 30, 2013
Tin Plating [Member]
Customer Lists [Member]
Jun. 30, 2013
Tin Plating [Member]
Noncompete Agreements [Member]
Jun. 30, 2013
Tin Plating [Member]
Formulations And Product Technology[Member]
Jun. 30, 2014
Australia [Member]
USD ($)
Jun. 30, 2014
Australia [Member]
AUD
Business Acquisition [Line Items]                          
Cash Paid for Acquisitions     $ 0 $ 2,478               $ 7,577 8,000
Goodwill 58,921   58,921   58,151     277          
Intangibles               830          
Intangible Assets, Amortizable Life             5 years   10 years 4 years 10 years    
Contingent Consideration Paid     4,709 0   100              
Change in Fair Value Estimate 0 675 0 675                  
Minority Interest Ownership Percentage                       49.00% 49.00%
Adjustments To Additional Paid In Capital Other                       $ 6,450