Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, gross	$ 420,303us-gaap_GoodwillGross	$ 422,250us-gaap_GoodwillGross
Accumulated impairment losses	(29,221)	(29,221)
Goodwill	391,082us-gaap_Goodwill	393,029us-gaap_Goodwill
Foreign currency translation adjustments	(1,947)us-gaap_GoodwillTranslationAdjustments
Fleet Management Solutions [Member]
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, gross	231,896	233,217
Accumulated impairment losses	(10,322)	(10,322)
Goodwill	221,574	222,895
Foreign currency translation adjustments	(1,321)
Dedicated Transportation Solutions [Member] [Member]
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, gross	40,808	40,808
Accumulated impairment losses	0	0
Goodwill	40,808	40,808
Foreign currency translation adjustments	0
Supply Chain Solutions [Member]
Carrying amount of goodwill attributable to each reportable business segment
Goodwill, gross	147,599	148,225
Accumulated impairment losses	(18,899)	(18,899)
Goodwill	128,700	129,326
Foreign currency translation adjustments	$ (626)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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