Fair Value Measurements - Changes of Level 3 Financial Instruments (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($)
Contingent consideration
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	$ 41,396
Accretion	884
Tecnidex acquisition	190
Stock compensation expense	(31)
Balance, ending period	42,439
Contingent consideration \| Tax amortization benefit contingency
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	40,467
Accretion	884
Tecnidex acquisition	0
Stock compensation expense	0
Balance, ending period	41,351
Contingent consideration \| Contingent consideration related to acquisition
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	379
Accretion	0
Tecnidex acquisition	190
Stock compensation expense	0
Balance, ending period	569
Contingent consideration \| Stock appreciation rights
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	146
Accretion	0
Tecnidex acquisition	0
Stock compensation expense	(74)
Balance, ending period	72
Contingent consideration \| Phantom shares
Financial instruments measured at Level 3 fair value on a recurring basis rollforward
Balance, beginning period	404
Accretion	0
Tecnidex acquisition	0
Stock compensation expense	43
Balance, ending period	447
Term loan
Financial instruments measured at Level 3 fair value on a recurring basis
Fair value of debt	$ 401,000

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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- Definition

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+ References

No definition available.

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