Goodwill and Other Intangible Assets Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Amortizable:
Gross amortized other intangible assets	$ 99,223	$ 86,880
Accumulated Amortization	(41,083)	(33,728)
Net amortized other intangible assets	58,140	53,152
Total other intangible assets, net	$ 112,463	105,103
Non-compete agreements
Amortizable:
Total estimated life	5 years
Gross amortized other intangible assets	$ 540	540
Dealer/customer related
Amortizable:
Total estimated life	7 years
Gross amortized other intangible assets	$ 79,382	67,079
Developed technology
Amortizable:
Gross amortized other intangible assets	$ 19,301	19,261
Developed technology | Minimum
Amortizable:
Total estimated life	5 years
Developed technology | Maximum
Amortizable:
Total estimated life	7 years
Brand names
Non-amortizable—indefinite lived:
Non-amortizable, Net	$ 54,323	$ 51,951