Goodwill (Details) $ in Thousands	6 Months Ended
Jun. 30, 2016 USD ($) reporting_unit
Goodwill [Roll Forward]
Goodwill, gross	$ 418,356
Accumulated impairment losses	(29,221)
Goodwill	389,135
Foreign currency translation adjustments	(857)
Goodwill, gross	417,499
Accumulated impairment losses	(29,221)
Goodwill	388,278
Fleet Management Solutions [Member]
Goodwill [Roll Forward]
Goodwill, gross	231,358
Accumulated impairment losses	(10,322)
Goodwill	221,036
Foreign currency translation adjustments	(1,246)
Goodwill, gross	230,112
Accumulated impairment losses	(10,322)
Goodwill	219,790
Dedicated Transportation Solutions [Member]
Goodwill [Roll Forward]
Goodwill, gross	40,808
Accumulated impairment losses	0
Goodwill	40,808
Foreign currency translation adjustments	0
Goodwill, gross	40,808
Accumulated impairment losses	0
Goodwill	40,808
Supply Chain Solutions [Member]
Goodwill [Roll Forward]
Goodwill, gross	146,190
Accumulated impairment losses	(18,899)
Goodwill	127,291
Foreign currency translation adjustments	389
Goodwill, gross	146,579
Accumulated impairment losses	(18,899)
Goodwill	$ 127,680
Quantitative [Member]
Goodwill [Roll Forward]
Number of Reporting Units \| reporting_unit	2
Qualitative Test [Member]
Goodwill [Roll Forward]
Number of Reporting Units \| reporting_unit	3

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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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

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- Definition

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

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reporting Unit
-URI http://asc.fasb.org/extlink&oid=6523643

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