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Acquisitions and Divestiture - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Business Acquisition [Line Items]          
Purchases of businesses, net of cash acquired       $ 1,840,845 $ 116,509
Pro forma information, estimated sales percent     10.00% 10.00%  
Proceeds from sale of business       $ 0 245,311
Gain on disposition of business   $ (141,000)   0 $ (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 $ 1,840,800        
Business acquisition, goodwill, expected tax deductible amount     $ 106,000 106,000  
2020 Consolidated Acquisition          
Business Acquisition [Line Items]          
Total other intangible assets acquired     942,300 942,300  
Finite-lived intangible assets acquired       797,000  
Expected amortization, remainder of fiscal year     47,000 47,000  
Future amortization expense, year one     47,000 47,000  
Future amortization expense, year two     47,000 47,000  
Future amortization expense, year three     47,000 47,000  
Future amortization expense, year four     47,000 47,000  
Future amortization expense, year five     $ 47,000 47,000  
2020 Consolidated Acquisition | Trade Names          
Business Acquisition [Line Items]          
Indefinite-lived intangible trade names acquired       145,300  
2020 Consolidated Acquisition | Customer Relationship          
Business Acquisition [Line Items]          
Finite-lived intangible assets acquired       $ 632,100  
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       $ 164,900  
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