Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, Gross, Beginning Balance	$ 406,527	$ 385,063
Accumulated impairment losses, Beginning Balance	(29,221)	(29,221)
Goodwill, Beginning Balance	377,306	355,842
Acquisitions	6,033	28,616
Purchase accounting adjustment	312	(6,798)
Foreign currency translation adjustment	565	(354)
Goodwill, Gross, Ending Balance	413,437	406,527
Accumulated impairment losses, Ending Balance	(29,221)	(29,221)
Goodwill, Ending Balance	384,216	377,306
Fleet Management Solutions [Member]
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, Gross, Beginning Balance	216,559	202,941
Accumulated impairment losses, Beginning Balance	(10,322)	(10,322)
Goodwill, Beginning Balance	206,237	192,619
Acquisitions	6,033	13,958
Purchase accounting adjustment	215	(185)
Foreign currency translation adjustment	322	(155)
Goodwill, Gross, Ending Balance	223,129	216,559
Accumulated impairment losses, Ending Balance	(10,322)	(10,322)
Goodwill, Ending Balance	212,807	206,237
Supply Chain Solutions [Member]
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, Gross, Beginning Balance	189,968	182,122
Accumulated impairment losses, Beginning Balance	(18,899)	(18,899)
Goodwill, Beginning Balance	171,069	163,223
Acquisitions	0	14,658
Purchase accounting adjustment	97	(6,613)
Foreign currency translation adjustment	243	(199)
Goodwill, Gross, Ending Balance	190,308	189,968
Accumulated impairment losses, Ending Balance	(18,899)	(18,899)
Goodwill, Ending Balance	$ 171,409	$ 171,069