Goodwill and Intangible Assets - Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Net intangible assets	$ 285,018	$ 314,175
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	270,693	251,557
Accumulated amortization	(92,947)	(62,283)
Net intangible assets	$ 177,746	$ 189,274
Weighted average useful life	10 years	10 years
Tradenames
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 90,000	$ 97,000
Accumulated amortization	(16,520)	(8,543)
Net intangible assets	$ 73,480	$ 88,457
Weighted average useful life	11 years	11 years
Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 43,055	$ 40,285
Accumulated amortization	(9,263)	(3,841)
Net intangible assets	$ 33,792	$ 36,444
Weighted average useful life	8 years	8 years