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Acquisitions - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 31, 2016
May 31, 2015
Mar. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Business Acquisition [Line Items]                
Operating income       $ 187.7 $ 128.2 $ 283.2 $ 195.5  
Net sales       1,297.8 1,165.1 2,404.3 2,115.9  
Norcraft Companies, Inc [Member]                
Business Acquisition [Line Items]                
Payment to acquire business   $ 15.5            
Business acquisition purchase price   $ 648.6            
Operating income       15.0   18.0    
Acquisition related transaction costs               $ 15.1
Net sales       106.0 $ 46.0 196.0 $ 46.0  
Net severance costs           2.0    
Goodwill expected to be deductible for income tax purposes       60.4   60.4    
Identifiable intangible assets, customer relationships       210.0   210.0    
Indefinite intangible assets, tradename       $ 150.0   $ 150.0    
Norcraft Companies, Inc [Member] | Customer Relationships                
Business Acquisition [Line Items]                
Amortizable identifiable intangible assets, estimated useful life           20 years    
Premium Showroom                
Business Acquisition [Line Items]                
Payment to acquire business $ 88.4              
Cabinets Component                
Business Acquisition [Line Items]                
Payment to acquire business     $ 6.0