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Acquisitions - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Jul. 28, 2017
May 04, 2017
Jan. 30, 2017
Nov. 16, 2016
Oct. 31, 2016
Sep. 30, 2017
Apr. 01, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Jul. 01, 2017
Dec. 31, 2016
Business Acquisition [Line Items]                        
Cash purchase price of acquisition, net of cash acquired                 $ 82,900,000      
Goodwill           $ 924,000,000     924,000,000     $ 895,500,000
Operating expenses           295,500,000   $ 261,500,000 853,300,000 $ 786,300,000    
Torque Control Specialist [Member]                        
Business Acquisition [Line Items]                        
Cash purchase price of acquisition $ 3,600,000                      
Cash purchase price of acquisition, net of cash acquired $ 3,500,000                      
Goodwill           1,900,000     1,900,000      
Norbar [Member]                        
Business Acquisition [Line Items]                        
Cash purchase price of acquisition   $ 71,600,000                    
Cash purchase price of acquisition, net of cash acquired   $ 69,900,000                    
Goodwill           23,700,000     23,700,000      
Working capital adjustment           800,000            
BTC [Member]                        
Business Acquisition [Line Items]                        
Cash purchase price of acquisition, net of cash acquired     $ 9,200,000                  
Goodwill           5,900,000     5,900,000   $ 5,900,000  
Ryeson Corporation [Member]                        
Business Acquisition [Line Items]                        
Cash purchase price of acquisition       $ 13,000,000                
Cash purchase price of acquisition, net of cash acquired       $ 12,600,000                
Goodwill           5,000,000 $ 5,000,000   5,000,000      
Working capital adjustment             100,000          
Car-O-Liner Holding AB [Member]                        
Business Acquisition [Line Items]                        
Cash purchase price of acquisition         $ 152,000,000              
Cash purchase price of acquisition, net of cash acquired         $ 148,100,000              
Goodwill           77,700,000     77,700,000      
Working capital adjustment             $ 200,000          
Pretax benefit/expense           $ 0.0     500,000      
Cost of goods sold                 200,000      
Operating expenses                 $ 300,000