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Acquisition and Divestiture - Additional Information (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 31, 2020 | Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019
Business Acquisition [Line Items] |  |  |  |  |
Purchases of businesses, net of cash acquired |  |  |  | $ 116,509 | $ 122,149
Gain (loss) on disposition of business |  |  |  | 141,020 | $ 0
2020 Consolidated Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchases of businesses, net of cash acquired | $ 116,500 |  |  |  |
Total other intangible assets acquired | $ 59,500 | $ 59,500 |  | 59,500 |
Finite-lived intangible assets acquired |  | 50,500 |  |  |
Future amortization expense, year one |  | 3,000 |  | 3,000 |
Future amortization expense, year two |  | 3,000 |  | 3,000 |
Future amortization expense, year three |  | 3,000 |  | 3,000 |
Future amortization expense, year four |  | 3,000 |  | 3,000 |
Future amortization expense, year five |  | 3,000 |  | $ 3,000 |
2020 Consolidated Acquisition | Trade Names |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Indefinite-lived intangible trade names acquired |  | 9,000 |  |  |
2020 Consolidated Acquisition | Customer Relationship |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets acquired |  | $ 38,000 |  |  |
Amortization period for finite-lived intangible asset |  | 20 years |  |  |
2020 Consolidated Acquisition | Purchased Technology |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets acquired |  | $ 12,500 |  |  |
Amortization period for finite-lived intangible asset |  |  |  | 15 years |
Kymera International |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination, consideration transferred |  |  | $ 245,300 |  |
Income tax expense relating to sale of business |  |  | 31,400 |  |
Kymera International | Other Income |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Gain (loss) on disposition of business |  |  | $ 141,000 |  |

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