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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 |  |  |  |  |

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