Acquisitions (Details Textual) - USD ($) $ in Millions						9 Months Ended
	Jul. 28, 2015	Aug. 27, 2014	Jul. 18, 2014	Mar. 14, 2014	Feb. 24, 2014	Sep. 30, 2015
Business Acquisition (Textual) [Abstract]
Contingent Consideration Arrangements, Range of Outcomes, Value, High						$ 10.4
Rich Logistics [Member]
Business Acquisition (Textual) [Abstract]
Date of acquisition						Feb. 24, 2014
Consideration Transferred					$ 46.5
Unitrans [Member]
Business Acquisition (Textual) [Abstract]
Date of acquisition						Mar. 14, 2014
Consideration Transferred				$ 53.3
ISI [Member]
Business Acquisition (Textual) [Abstract]
Date of acquisition						Jul. 18, 2014
Consideration Transferred			$ 13.0
Active Aero [Member]
Business Acquisition (Textual) [Abstract]
Date of acquisition						Aug. 27, 2014
Consideration Transferred		$ 118.1
Stagecoach [Member]
Business Acquisition (Textual) [Abstract]
Date of acquisition						Jul. 28, 2015
Consideration Transferred	$ 32.3
Contingent Consideration Arrangements, Range of Outcomes, Value, High						$ 5.0
Stagecoach [Member] | 2016 [Member]
Business Acquisition (Textual) [Abstract]
Contingent Consideration Arrangements, Basis						7.0
Stagecoach [Member] | 2017 [Member]
Business Acquisition (Textual) [Abstract]
Contingent Consideration Arrangements, Basis						7.0
Stagecoach [Member] | 2018 [Member]
Business Acquisition (Textual) [Abstract]
Contingent Consideration Arrangements, Basis						7.0
Stagecoach [Member] | 2019 [Member]
Business Acquisition (Textual) [Abstract]
Contingent Consideration Arrangements, Basis						$ 7.0