Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	$ 1,638,944	$ 1,662,116
Intangible assets, Accumulated Amortization	896,758	833,612
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	1,412,954	1,418,250
Intangible assets, Accumulated Amortization	767,532	713,656
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	162,183	176,046
Intangible assets, Accumulated Amortization	92,258	87,680
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross Amount	63,807	67,820
Intangible assets, Accumulated Amortization	$ 36,968	$ 32,276