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Fair Values of Financial Instruments - Deferred Compensation Plan Commodity Hedging Agreements and Acquisition Related Contingent Consideration (Detail) - USD ($)
$ in Thousands
Jul. 01, 2018
Apr. 01, 2018
Dec. 31, 2017
Jul. 02, 2017
Apr. 02, 2017
Jan. 01, 2017
Assets:            
Commodity hedging agreements $ 1,750   $ 4,420      
Fair Value Level 1 [Member]            
Assets:            
Deferred compensation plan assets 34,555   33,166      
Liabilities:            
Deferred compensation plan liabilities 34,555   33,166      
Fair Value Level 2 [Member]            
Liabilities:            
Non-public variable rate debt 400,000   507,000      
Non-public fixed rate debt 258,800   126,400      
Public debt securities 457,100   475,100      
Fair Value Level 2 [Member] | Commodity Contract [Member]            
Assets:            
Commodity hedging agreements 1,750   4,420      
Fair Value Level 3 [Member]            
Liabilities:            
Acquisition related contingent consideration 374,537 $ 368,804 381,291 $ 319,102 $ 303,952 $ 253,437
Carrying Amount [Member]            
Assets:            
Deferred compensation plan assets 34,555   33,166      
Liabilities:            
Deferred compensation plan liabilities 34,555   33,166      
Non-public variable rate debt 399,485   506,398      
Non-public fixed rate debt 274,678   124,829      
Public debt securities 457,150   456,791      
Acquisition related contingent consideration 374,537   381,291      
Carrying Amount [Member] | Commodity Contract [Member]            
Assets:            
Commodity hedging agreements 1,750   4,420      
Total Fair Value [Member]            
Assets:            
Deferred compensation plan assets 34,555   33,166      
Liabilities:            
Deferred compensation plan liabilities 34,555   33,166      
Acquisition related contingent consideration 374,537   381,291      
Non-public variable rate debt 400,000   507,000      
Non-public fixed rate debt 258,800   126,400      
Public debt securities 457,100   475,100      
Total Fair Value [Member] | Commodity Contract [Member]            
Assets:            
Commodity hedging agreements $ 1,750   $ 4,420