Acquisitions - Fair Value of Assets Acquired and Liabilities Assumed (Details) - Globe Holding Company LLC $ in Thousands	Jul. 31, 2017 USD ($)
Business Acquisition [Line Items]
Current assets (including cash)	$ 28,600
Cash included in current assets	58
Property, plant and equipment and other noncurrent assets	8,300
Goodwill	74,500
Total assets acquired	222,100
Total liabilities assumed	5,700
Net assets acquired	216,400
Trade name
Business Acquisition [Line Items]
Intangible assets	60,000
Distributor relationships
Business Acquisition [Line Items]
Intangible assets	40,200
Acquired technology and other intangible assets
Business Acquisition [Line Items]
Intangible assets	$ 10,500