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Goodwill and Related Intangible Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Goodwill [Roll Forward]    
Balance at $ 236,044  
Acquired goodwill 56,500  
Foreign currency translation (604)  
Balance at 291,940  
Accumulated impairment losses 255,530 $ 255,530
Residential Products    
Goodwill [Roll Forward]    
Balance at 181,285  
Acquired goodwill 0  
Foreign currency translation 0  
Balance at 181,285  
Industrial and Infrastructure Products    
Goodwill [Roll Forward]    
Balance at 54,759  
Acquired goodwill 0  
Foreign currency translation (872)  
Balance at 53,887  
RBI    
Goodwill [Roll Forward]    
Balance at 0  
Acquired goodwill 56,500  
Foreign currency translation 268  
Balance at $ 56,768