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Acquisitions and Dispositions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended									12 Months Ended
	Jul. 31, 2017	Apr. 30, 2017	Apr. 30, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 29, 2016
Business Acquisition [Line Items]
Business acquisition share price																$ 23.00
Stock-based compensation expense													$ 27,262	$ 24,378	$ 25,228
Total proceeds from sale of business unit, net of cash sold		$ 72,509												72,509
Pre-tax gain		$ 74,856												74,856
Net revenues				$ 460,541	$ 487,152	$ 573,140	$ 554,275	$ 511,800	$ 486,267	$ 480,757	$ 437,153		2,075,108	$ 1,915,977	1,295,342
Data Analytics Solutions Business [Member]
Business Acquisition [Line Items]
Net revenues															12,700
Minority Interest in Private Company [Member]
Business Acquisition [Line Items]
Investments in minority interest	$ 100		$ 9,300
Impairment charges												$ 5,000
Newport [Member]
Business Acquisition [Line Items]
Business acquisition share price																$ 23.00
Fair value write-up of acquired finished goods inventory				15,090									15,090
Incremental costs of sales charge															15,090
Fair value write-up of acquired property, plant and equipment				$ 36,242									$ 36,242
Compensation expense															6,635
Stock-based compensation expense															$ 3,334

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