Intangible Assets

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

8. Intangible Assets

Goodwill, customer relationships and trademarks consist of the following amounts (in thousands):

	September 30, 2020		December 31, 2019
Goodwill	$	120,343	$	120,343
Customer relationships—Acquired
Cost	$	64,083	$	64,083
Accumulated amortization	(47,300)		(40,231)
Customer relationships—Acquired	$	16,783	$	23,852
Customer relationships—Other
Cost	$	17,056	$	17,056
Accumulated amortization	(13,046)		(9,534)
Customer relationships—Other, net	$	4,010	$	7,522
Trademarks
Cost	$	7,570	$	8,502
Accumulated amortization	(2,694)		(2,794)
Trademarks, net	$	4,876	$	5,708

Changes in goodwill, customer relationships (including non-compete agreements) and trademarks consisted of the following (in thousands):

	Goodwill		Customer Relationships— Acquired		Customer Relationships— Other		Trademarks
Balance at December 31, 2019	$	120,343	$	23,852	$	7,522	$	5,708
Additions	—		—		—		—
Amortization	—		(7,069)		(3,512)		(832)
Balance at September 30, 2020	$	120,343	$	16,783	$	4,010	$	4,876

Estimated future amortization expense for customer relationships and trademarks at September 30, 2020 is as follows (in thousands):

Year ending December 31,
2020 (remaining three months)	$	3,304
2021	13,142
2022	6,194
2023	605
2024	404
> 5 years	2,020
Total	$	25,669