Components of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified				12 Months Ended								12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Non-compete agreements	Dec. 31, 2012 Non-compete agreements	Dec. 31, 2013 Dealer/customer related	Dec. 31, 2012 Dealer/customer related	Dec. 31, 2013 Developed technology	Dec. 31, 2012 Developed technology	Dec. 31, 2013 Brand/Trade Names	Dec. 31, 2012 Brand/Trade Names	Dec. 31, 2013 Developed technology Minimum	Dec. 31, 2012 Developed technology Minimum	Dec. 31, 2013 Developed technology Maximum	Dec. 31, 2012 Developed technology Maximum
Intangible Assets by Major Class [Line Items]
Total Estimated Life (years)				5 years	5 years	7 years	7 years					5 years	5 years	7 years	7 years
Amortizable, Gross Carrying Amount	$ 75,091	$ 28,216		$ 540	$ 540	$ 59,244	$ 14,702	$ 15,307	$ 12,974
Accumulated Amortization	(13,268)	(4,015)	(1,206)	(185)	(77)	(8,608)	(1,650)	(4,475)	(2,288)
Non-amortizable, Gross Carrying Amount										41,188	26,691
Amortizable, Net	61,823	24,201		355	463	50,636	13,052	10,832	10,686
Total other intangible assets, Gross Carrying Amount	116,279	54,907	34,256
Non-amortizable, Net										41,188	26,691
Total other intangible assets, net	$ 103,011	$ 50,892