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Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Gross	$ 273,696	$ 257,354
Accumulated Amortization	87,113	76,404
Net Book Value	186,583	180,950
Gross	299,486	279,538
Net Book Value	212,373	203,134
Goodwill
Finite Lived Intangible Assets [Line Items]
Gross	25,790	22,184
Net Book Value	25,790	22,184
Product Registrations
Finite Lived Intangible Assets [Line Items]
Gross	235,684	223,022
Accumulated Amortization	79,627	70,701
Net Book Value	156,057	152,321
Trademarks
Finite Lived Intangible Assets [Line Items]
Gross	30,483	27,541
Accumulated Amortization	5,337	4,233
Net Book Value	25,146	23,308
Customer Lists
Finite Lived Intangible Assets [Line Items]
Gross	7,529	6,791
Accumulated Amortization	2,149	1,470
Net Book Value	$ 5,380	$ 5,321

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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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-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
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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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