Goodwill (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017 USD ($) segment	Jun. 30, 2017 USD ($) segment	Apr. 01, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill		$ 415,993
Accumulated impairment losses		(29,221)
Goodwill		386,772
Foreign currency translation adjustments		1,150
Goodwill	$ 417,143	417,143
Accumulated impairment losses	(29,221)	(29,221)
Goodwill	387,922	$ 387,922
Number of reportable segments \| segment		3
Goodwill	387,922	$ 386,772
Fleet Management Solutions
Goodwill [Roll Forward]
Goodwill		228,832
Accumulated impairment losses		(10,322)
Goodwill		218,510
Foreign currency translation adjustments		943
Goodwill	229,775	229,775
Accumulated impairment losses	(10,322)	(10,322)
Goodwill	219,453	219,453
Goodwill	219,453	218,510
Supply Chain Solutions
Goodwill [Roll Forward]
Goodwill		40,808
Accumulated impairment losses		0
Goodwill		40,808
Foreign currency translation adjustments		0
Goodwill	40,808	40,808
Accumulated impairment losses	0	0
Goodwill	40,808	40,808
Goodwill	40,808	40,808
Dedicated Transportation Solutions
Goodwill [Roll Forward]
Goodwill		146,353
Accumulated impairment losses		(18,899)
Goodwill		127,454
Foreign currency translation adjustments		207
Goodwill	146,560	146,560
Accumulated impairment losses	(18,899)	(18,899)
Goodwill	127,661	127,661
Goodwill	$ 127,661	$ 127,454
Qualitative Test
Goodwill [Roll Forward]
Number of reportable segments \| segment	3
Quantitative
Goodwill [Roll Forward]
Number of reportable segments \| segment	2
FMS Europe
Goodwill [Roll Forward]
Goodwill			$ 14,000
Percentage of fair value in excess of carrying amount			25.00%

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=77989000&loc=SL49117168-202975

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