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Acquisitions Acquisition (Details 1) - USD ($)
Mar. 03, 2018
Jun. 13, 2017
Jun. 12, 2017
Mar. 04, 2017
Dec. 14, 2016
Feb. 27, 2016
Business Acquisition            
Goodwill $ 180,956,000     $ 101,334,000   $ 73,996,000
EFCO Corporation            
Business Acquisition            
Net working capital   $ 2,000,000 $ 7,689,000      
Property, plant and equipment     44,641,000      
Goodwill     84,162,000      
Other intangible assets     71,500,000      
Less: Long-term liabilities acquired, net     17,643,000      
Net assets acquired     $ 190,349,000      
Sotawall            
Business Acquisition            
Net working capital         $ 10,682  
Property, plant and equipment         7,993  
Goodwill         21,380  
Other intangible assets         94,630  
Net assets acquired         $ 134,685