Fair Value Measurements - Financial Instruments Measured on a Recurring Basis (Details) - USD ($)				6 Months Ended
		Apr. 04, 2017	Jul. 31, 2015	Jun. 30, 2018	Dec. 31, 2017
Recurring
Financial instruments measured at fair value on a recurring basis
Level 1 to level 2 transfers				$ 0
Transfers				0
Contingent consideration | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of liability				43,532,000	$ 44,983,000
Contingent consideration | Recurring | Stock appreciation rights
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[1]			156,000	268,000
Contingent consideration | Recurring | Phantom shares
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[2]			348,000	186,000
Contingent consideration | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of liability				0	0
Contingent consideration | Recurring | Level 1 | Stock appreciation rights
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[1]			0	0
Contingent consideration | Recurring | Level 1 | Phantom shares
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[2]			0	0
Contingent consideration | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of liability				(3,325,000)	456,000
Contingent consideration | Recurring | Level 2 | Stock appreciation rights
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[1]			0	0
Contingent consideration | Recurring | Level 2 | Phantom shares
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[2]			0	0
Contingent consideration | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of liability				46,857,000	44,527,000
Contingent consideration | Recurring | Level 3 | Stock appreciation rights
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[1]			156,000	268,000
Contingent consideration | Recurring | Level 3 | Phantom shares
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[2]			348,000	186,000
Contingent consideration | AgroFresh Inc. | Recurring | Tax amortization benefit contingency
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[3]			45,425,000	43,382,000
Contingent consideration | AgroFresh Inc. | Recurring | Contingent consideration related to acquisition
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[4]			928,000	691,000
Contingent consideration | AgroFresh Inc. | Recurring | Interest rate contract
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[5]			(3,325,000)	456,000
Contingent consideration | AgroFresh Inc. | Recurring | Level 1 | Tax amortization benefit contingency
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[3]			0	0
Contingent consideration | AgroFresh Inc. | Recurring | Level 1 | Contingent consideration related to acquisition
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[4]			0	0
Contingent consideration | AgroFresh Inc. | Recurring | Level 1 | Interest rate contract
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[5]			0	0
Contingent consideration | AgroFresh Inc. | Recurring | Level 2 | Tax amortization benefit contingency
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[3]			0	0
Contingent consideration | AgroFresh Inc. | Recurring | Level 2 | Contingent consideration related to acquisition
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[4]			0	0
Contingent consideration | AgroFresh Inc. | Recurring | Level 2 | Interest rate contract
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[5]			(3,325,000)	456,000
Contingent consideration | AgroFresh Inc. | Recurring | Level 3 | Tax amortization benefit contingency
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[3]			$ 45,425,000	43,382,000
Tax effect rate				35.30%
Non-current portion new tax rate effect				21.50%
Contingent consideration | AgroFresh Inc. | Recurring | Level 3 | Contingent consideration related to acquisition
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[4]			$ 928,000	691,000
Contingent consideration | AgroFresh Inc. | Recurring | Level 3 | Interest rate contract
Financial instruments measured at fair value on a recurring basis
Fair value of liability	[5]			$ 0	$ 0
Dow | Tax receivables agreement (TRA)
Financial instruments measured at fair value on a recurring basis
Percentage of tax savings to be paid		50.00%	85.00%

[1] The fair value of the stock appreciation rights was measured using a Black Scholes pricing model during the six months ended June 30, 2018. The valuation technique used did not change during the six months ended June 30, 2018.

[2] The fair value of phantom shares are based on the fair value of the Company's common stock. The valuation technique used did not change during the six months ended June 30, 2018.

[3] The fair value of the tax amortization benefit contingency is measured using an income approach based on the Company’s best estimate of the undiscounted cash payments to be made, with the current portion tax effected at 35.3% and the non-current portion tax effected at 21.5% due to the TCJA enacted in the U.S and discounted to present value utilizing an appropriate market discount rate. Per the TRA Amendment, payments due to Dow under the Tax Receivable Agreement were reduced from 85% to 50% of the applicable tax savings realized by the Company. The valuation technique used did not change during the six months ended June 30, 2018.

[4] The fair value of the contingent consideration related to the Tecnidex acquisition.

[5] The derivative assets and liabilities relate to an interest rate derivative that is measured at fair value using observable market inputs such as interest rates, our own credit risks as well as an evaluation of the counterparts' credit risks. The fair value for the six months ended June 30, 2018 resulted in an asset balance while the three months ended December 31, 2017 was in a liability balance.