Acquisitions (Details Textual) - USD ($) $ in Millions					6 Months Ended
	Aug. 27, 2014	Jul. 18, 2014	Mar. 14, 2014	Feb. 24, 2014	Jun. 30, 2015
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