Acquisitions (Details) $ in Thousands, € in Millions			3 Months Ended			6 Months Ended
	Apr. 07, 2017 USD ($)	Oct. 07, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 EUR (€)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jan. 17, 2017	Dec. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Additional payment for working capital adjustment			$ 600
Goodwill			$ 1,145,165			$ 1,145,165		$ 1,000,123
PhytoTechnology [Member]
Business Acquisition [Line Items]
Percentage of interests acquired	100.00%
Payments to acquire businesses	$ 55,000
Cash acquired	300
Contingent consideration, liability	1,400
Contingent consideration, liability, maximum	10,000
Purchase price exceeds preliminary fair value of net assets	46,700
Goodwill	13,900
PhytoTechnology [Member] | Trade names
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 4,500
Acquired intangible assets useful life	14 years
PhytoTechnology [Member] | Proprietary technology
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 27,500
Acquired intangible assets useful life	14 years
PhytoTechnology [Member] | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 800
Acquired intangible assets useful life	4 years
Lucas Meyer [Member]
Business Acquisition [Line Items]
Percentage of interests acquired							100.00%
Cash acquired				€ 13.7	$ 14,500
Goodwill					79,400
Total consideration for acquisition				€ 142.0	150,500
Purchase price over carrying value of net assets					122,100
Deferred tax liabilities									$ 23,000
Lucas Meyer [Member] | Trade Names and Proprietary Technology [Member]
Business Acquisition [Line Items]
Intangible assets acquired					6,100
Lucas Meyer [Member] | Trade names
Business Acquisition [Line Items]
Acquired intangible assets useful life						2 years
Lucas Meyer [Member] | Proprietary technology
Business Acquisition [Line Items]
Acquired intangible assets useful life						5 years
Lucas Meyer [Member] | Customer relationships
Business Acquisition [Line Items]
Intangible assets acquired					$ 59,600
David Michael & Company, Inc. [Member]
Business Acquisition [Line Items]
Percentage of interests acquired		100.00%
Cash acquired		$ 5,100
Purchase price exceeds preliminary fair value of net assets		168,700
Goodwill		110,200
Total consideration for acquisition		243,000
David Michael & Company, Inc. [Member] | Trade Names and Proprietary Technology [Member]
Business Acquisition [Line Items]
Intangible assets acquired		$ 8,400
David Michael & Company, Inc. [Member] | Trade names
Business Acquisition [Line Items]
Acquired intangible assets useful life		2 years
David Michael & Company, Inc. [Member] | Proprietary technology
Business Acquisition [Line Items]
Acquired intangible assets useful life		5 years
David Michael & Company, Inc. [Member] | Customer relationships
Business Acquisition [Line Items]
Intangible assets acquired		$ 50,000
Minimum | Lucas Meyer [Member] | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life						12 years
Minimum | David Michael & Company, Inc. [Member] | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life		18 years
Maximum | Lucas Meyer [Member] | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life						16 years
Maximum | David Michael & Company, Inc. [Member] | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets useful life		20 years