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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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Intangible assets gross including goodwill.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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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.

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