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Aquisitions (Summary Of The Preliminary Purchase Price Allocations) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Dec. 01, 2014
Business Acquisition [Line Items]      
Goodwill $ 92,976 $ 93,733  
Vetriceramici S.p.A. [Member]      
Business Acquisition [Line Items]      
Net working capital     $ 27,055
Real property     8,291
Personal property     12,204
Other assets and liabilities     (13,169)
Intangibles     42,060
Goodwill     32,431
Net assets acquired     $ 108,872