Goodwill and Other Intangible Assets Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Amortizable:
Gross amortized other intangible assets	$ 85,184	$ 77,869
Accumulated Amortization	(27,671)	(23,158)
Net amortized other intangible assets	57,513	54,711
Total other intangible assets, net	$ 105,450	100,935
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	$ 65,176	62,758
Developed technology
Amortizable:
Gross amortized other intangible assets	$ 19,468	14,571
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	$ 47,937	$ 46,224