Intangibles - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Intangible Assets Disclosure [Line Items]
Trade names	$ 602,800		$ 602,800		$ 603,400
Intangible assets, amortization expense	$ 9,899	$ 9,350	$ 20,251	$ 18,394
Patents
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			10 years
Customer Relationships
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			16 years
Other Intangibles
Intangible Assets Disclosure [Line Items]
Intangible assets, weighted average useful life (years)			14 years