Acquisitions - Consideration Transferred (Details) - USD ($)		3 Months Ended
	Jun. 01, 2015	Mar. 31, 2016
Business Acquisition [Line Items]
Contingent consideration, fair value		$ (1,176,417)
Command Transportation, LLC
Business Acquisition [Line Items]
Cash	$ 394,279,778
Echo common stock, fair value	14,746,000
Contingent consideration, fair value	(1,176,417)
Working capital adjustment, December 2015	(142,969)
Total consideration transferred	$ 407,706,392
Contingent consideration
Business Acquisition [Line Items]
Contingent consideration receivable		1,176,417
Maximum | Contingent consideration
Business Acquisition [Line Items]
Contingent consideration receivable		$ 1,500,000