Fair Value Measurements - Fair value of Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands				12 Months Ended
		Apr. 04, 2017	Jul. 31, 2015	Dec. 31, 2018	Dec. 31, 2017
Contingent consideration | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				$ 41,396	$ 44,983
Contingent consideration | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	456
Contingent consideration | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				41,396	44,527
Contingent consideration | Stock appreciation rights | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				146	268
Contingent consideration | Stock appreciation rights | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | Stock appreciation rights | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | Stock appreciation rights | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				146	268
Contingent consideration | Phantom shares | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				404	186
Contingent consideration | Phantom shares | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | Phantom shares | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | Phantom shares | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				404	186
Contingent consideration | AgroFresh Inc. | Tax amortization benefit contingency | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				40,467	43,382
Contingent consideration | AgroFresh Inc. | Tax amortization benefit contingency | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | AgroFresh Inc. | Tax amortization benefit contingency | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | AgroFresh Inc. | Tax amortization benefit contingency | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				$ 40,467	43,382
Current portion tax effect rate	[1]			21.50%
Non-current portion new tax effect rate	[1]			21.50%
Contingent consideration | AgroFresh Inc. | Contingent consideration related to acquisition | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				$ 379	691
Contingent consideration | AgroFresh Inc. | Contingent consideration related to acquisition | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | AgroFresh Inc. | Contingent consideration related to acquisition | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				0	0
Contingent consideration | AgroFresh Inc. | Contingent consideration related to acquisition | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability				$ 379	691
Contingent consideration | AgroFresh Inc. | Interest rate contract | Recurring
Financial instruments measured at fair value on a recurring basis
Fair value of the liability					456
Contingent consideration | AgroFresh Inc. | Interest rate contract | Recurring | Level 1
Financial instruments measured at fair value on a recurring basis
Fair value of the liability					0
Contingent consideration | AgroFresh Inc. | Interest rate contract | Recurring | Level 2
Financial instruments measured at fair value on a recurring basis
Fair value of the liability					456
Contingent consideration | AgroFresh Inc. | Interest rate contract | Recurring | Level 3
Financial instruments measured at fair value on a recurring basis
Fair value of the liability					$ 0
Dow Chemical | Tax receivables agreement
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 contingent consideration related to the Tecnidex acquisition.