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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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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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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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