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Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Gross | $ 309,267 | $ 297,493
Accumulated Amortization | 111,753 | 99,232
Net Book Value | 197,514 | 198,261
Gross | 361,375 | 344,166
Net Book Value | 249,622 | 244,934
Goodwill |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | 52,108 | 46,673
Net Book Value | 52,108 | 46,673
Product Registrations |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | 260,393 | 249,428
Accumulated Amortization | 99,228 | 89,204
Net Book Value | 161,165 | 160,224
Trademarks |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | 37,335 | 36,037
Accumulated Amortization | 8,111 | 6,633
Net Book Value | 29,224 | 29,404
Customer Lists |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross | 11,539 | 12,028
Accumulated Amortization | 4,414 | 3,395
Net Book Value | $ 7,125 | $ 8,633

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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
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