Intangibles and Goodwill - Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Intangible assets:
Goodwill	$ 309,589,000		$ 309,589,000		$ 309,589,000
Accumulated impairment losses			0
Summary of amortizable intangible assets:
Cost	179,418,000		179,418,000		179,418,000
Accumulated Amortization	(100,421,000)		(100,421,000)		(92,630,000)
Net	78,997,000		78,997,000		86,788,000
Amortization expense	2,600,000	$ 2,700,000	7,800,000	$ 8,300,000
Estimated amortization expense for the next five years and thereafter:
Remainder of 2021	2,571,000		2,571,000
2022	10,005,000		10,005,000
2023	9,501,000		9,501,000
2024	8,897,000		8,897,000
2025	8,201,000		8,201,000
Thereafter	39,822,000		39,822,000
Net	78,997,000		78,997,000		86,788,000
Customer relationships
Summary of amortizable intangible assets:
Cost	150,239,000		150,239,000		150,239,000
Accumulated Amortization	(83,370,000)		(83,370,000)		(76,677,000)
Net	66,869,000		$ 66,869,000		73,562,000
Weighted-average, useful life			14 years 9 months 18 days
Estimated amortization expense for the next five years and thereafter:
Net	66,869,000		$ 66,869,000		73,562,000
Carrier relationships
Summary of amortizable intangible assets:
Cost	18,300,000		18,300,000		18,300,000
Accumulated Amortization	(6,818,000)		(6,818,000)		(6,010,000)
Net	11,482,000		$ 11,482,000		12,290,000
Weighted-average, useful life			17 years
Estimated amortization expense for the next five years and thereafter:
Net	11,482,000		$ 11,482,000		12,290,000
Non-compete agreements
Summary of amortizable intangible assets:
Cost	5,239,000		5,239,000		5,239,000
Accumulated Amortization	(4,593,000)		(4,593,000)		(4,303,000)
Net	646,000		$ 646,000		936,000
Weighted-average, useful life			6 years 8 months 12 days
Estimated amortization expense for the next five years and thereafter:
Net	646,000		$ 646,000		936,000
Trade names
Summary of amortizable intangible assets:
Cost	5,640,000		5,640,000		5,640,000
Accumulated Amortization	(5,640,000)		(5,640,000)		(5,640,000)
Net	0		$ 0		0
Weighted-average, useful life			4 years
Estimated amortization expense for the next five years and thereafter:
Net	$ 0		$ 0		$ 0

Echo Global Logistics, Inc. 10-Q