Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016	Dec. 31, 2016
Finite And Indefinite Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 0
Intangible asset amortization expense	$ 23,000,000		$ 18,500,000	$ 68,400,000	$ 54,100,000
Future amortization expense, in 2017	91,200,000			91,200,000
Future amortization expense, in 2018	89,600,000			89,600,000
Future amortization expense, in 2019	86,700,000			86,700,000
Future amortization expense, in 2020	84,400,000			84,400,000
Future amortization expense, in 2021	$ 83,100,000			$ 83,100,000
Minimum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life				5 years		5 years
Maximum [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Intangible assets, useful life				22 years		22 years