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Acquisitions and Divestiture - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2020
Apr. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Business Acquisition [Line Items]            
Purchases of businesses, net of cash acquired         $ 1,839,664 $ 116,509
Pro forma information, estimated sales percent     11.00% 10.00% 6.00% 10.00%
Proceeds from sale of business         $ 12,000 $ 245,311
Gain on disposition of business $ 141,000       6,349 $ 141,020
Income tax expense relating to sale of business 31,400          
2021 Consolidated Acquisition            
Business Acquisition [Line Items]            
Purchases of businesses, net of cash acquired   $ 1,839,700        
Business acquisition, goodwill, expected tax deductible amount     $ 108,000   108,000  
2020 Consolidated Acquisition            
Business Acquisition [Line Items]            
Total other intangible assets acquired     869,700   869,700  
Finite-lived intangible assets acquired         753,600  
Expected amortization, remainder of fiscal year     41,000   41,000  
Future amortization expense, year one     41,000   41,000  
Future amortization expense, year two     41,000   41,000  
Future amortization expense, year three     41,000   41,000  
Future amortization expense, year four     41,000   41,000  
Future amortization expense, year five     $ 41,000   41,000  
2020 Consolidated Acquisition | Trade Names            
Business Acquisition [Line Items]            
Indefinite-lived intangible trade names acquired         116,100  
2020 Consolidated Acquisition | Customer Relationship            
Business Acquisition [Line Items]            
Finite-lived intangible assets acquired         $ 569,900  
2020 Consolidated Acquisition | Customer Relationship | Minimum            
Business Acquisition [Line Items]            
Amortization period for finite-lived intangible asset         15 years  
2020 Consolidated Acquisition | Customer Relationship | Maximum            
Business Acquisition [Line Items]            
Amortization period for finite-lived intangible asset         20 years  
2020 Consolidated Acquisition | Purchased Technology            
Business Acquisition [Line Items]            
Finite-lived intangible assets acquired         $ 183,700  
2020 Consolidated Acquisition | Purchased Technology | Minimum            
Business Acquisition [Line Items]            
Amortization period for finite-lived intangible asset         11 years  
2020 Consolidated Acquisition | Purchased Technology | Maximum            
Business Acquisition [Line Items]            
Amortization period for finite-lived intangible asset         20 years  
Kymera International | Reading Alloys            
Business Acquisition [Line Items]            
Proceeds from sale of business $ 245,300