Acquisitions - Preliminary Fair Values of the Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 19, 2016	Dec. 31, 2015	Oct. 21, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 333,276		$ 340,338		$ 252,520
Senscient, Incorporated
Business Acquisition [Line Items]
Current assets		$ 0
Cash included in current assets		700
Property, plant and equipment		0
Goodwill		0
Total assets acquired		0
Total liabilities assumed		0
Net assets acquired		0
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
Trade name and acquired technology | Latchways
Business Acquisition [Line Items]
Intangible assets				14,600
Acquired technology | Senscient, Incorporated
Business Acquisition [Line Items]
Intangible assets		0
Customer-related intangibles | Senscient, Incorporated
Business Acquisition [Line Items]
Intangible assets		$ 0
Customer-related intangibles | Latchways
Business Acquisition [Line Items]
Intangible assets				$ 53,000