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Basis of Presentation (Details 6) (USD $)
6 Months Ended 1 Months Ended 1 Months Ended 3 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Jun. 30, 2014
North America
Dec. 31, 2013
North America
Jun. 30, 2013
North America
Jun. 30, 2014
Europe
Dec. 31, 2013
Europe
Jun. 30, 2013
Europe
Feb. 28, 2013
ShearBrace
Feb. 28, 2013
ShearBrace
North America
Nov. 30, 2013
Bierbach GmbH & Co. KG [Member]
Nov. 30, 2013
Bierbach GmbH & Co. KG [Member]
Europe
Mar. 31, 2014
S&P Clever
Acquisitions                            
Cash paid for acquisition                   $ 5,300,000   $ 1,200,000    
Goodwill 129,231,000 129,218,000 122,678,000 84,806,000 84,822,000 81,080,000 42,632,000 42,690,000 39,853,000   900,000   700,000  
Intangible assets                   3,600,000   600,000    
Weighted-average amortization period                   11 years 3 months 18 days        
Contingent liability incurred                       800,000    
Deferred consideration payment                           1,100,000
Contingent consideration payment                           200,000
Contingent consideration payable                           $ 1,500,000
Maximum period for payment for adjustments to provisional fair value measurements 1 year