Acquisitions - Preliminary Fair Values of the Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jul. 31, 2017	Dec. 31, 2016	Sep. 19, 2016	Dec. 31, 2015	Oct. 21, 2015
Business Acquisition [Line Items]
Goodwill	$ 422,185		$ 333,276		$ 340,338
Senscient, Incorporated
Business Acquisition [Line Items]
Current assets				$ 5,900
Cash included in current assets				700
Property, plant and equipment				300
Goodwill				10,500
Total assets acquired				21,100
Total liabilities assumed				2,000
Net assets acquired				19,100
Globe Holding Company LLC
Business Acquisition [Line Items]
Current assets		$ 28,600
Cash included in current assets		58
Property, plant and equipment		8,300
Goodwill		74,500
Total assets acquired		222,100
Total liabilities assumed		5,700
Net assets acquired		216,400
Latchways
Business Acquisition [Line Items]
Current assets						$ 35,700
Cash included in current assets						10,600
Property, plant and equipment						9,500
Goodwill						98,000
Total assets acquired						210,800
Total liabilities assumed						19,900
Net assets acquired						190,900
Customer-related intangibles | Globe Holding Company LLC
Business Acquisition [Line Items]
Finite-lived intangible assets		40,200
Trade name and acquired technology | Latchways
Business Acquisition [Line Items]
Finite-lived intangible assets						14,600
Acquired technology | Senscient, Incorporated
Business Acquisition [Line Items]
Finite-lived intangible assets				1,600
Acquired technology | Globe Holding Company LLC
Business Acquisition [Line Items]
Finite-lived intangible assets		10,500
Customer relationships | Senscient, Incorporated
Business Acquisition [Line Items]
Finite-lived intangible assets				$ 2,800
Customer relationships | Latchways
Business Acquisition [Line Items]
Finite-lived intangible assets						$ 53,000
Trade Names | Globe Holding Company LLC
Business Acquisition [Line Items]
Indefinite-lived intangible assets		$ 60,000