- Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 514,798	$ 522,354
Accumulated Amortization	(126,530)	(94,136)	$ (76,634)
Net	388,268	428,218
Total other intangible assets, Gross Carrying Amount	956,828	964,653	$ 423,846
Total other intangible assets, net	$ 830,298	$ 870,517
Non-compete agreements
Intangible Assets by Major Class [Line Items]
Estimated Life (Years)	4 years	4 years
Gross Carrying Amount	$ 2,630	$ 2,630
Accumulated Amortization	(986)	(329)
Net	1,644	2,301
Dealer/customer related
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	499,513	506,401
Accumulated Amortization	(116,142)	(85,614)
Net	$ 383,371	$ 420,787
Dealer/customer related | Minimum
Intangible Assets by Major Class [Line Items]
Estimated Life (Years)	5 years	5 years
Dealer/customer related | Maximum
Intangible Assets by Major Class [Line Items]
Estimated Life (Years)	20 years	20 years
Developed technology
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 12,655	$ 13,323
Accumulated Amortization	(9,402)	(8,193)
Net	$ 3,253	$ 5,130
Developed technology | Minimum
Intangible Assets by Major Class [Line Items]
Estimated Life (Years)	5 years	5 years
Developed technology | Maximum
Intangible Assets by Major Class [Line Items]
Estimated Life (Years)	7 years	7 years
Non-amortizable—brand/trade names
Intangible Assets by Major Class [Line Items]
Non-amortizable—brand/trade names	$ 442,030	$ 442,299
Non-amortizable, Net	$ 442,030	$ 442,299