Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

8. Intangible Assets

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

	December 31, 2021		December 31, 2020
Goodwill	$	120,343	$	120,343
Customer Relationships— Acquired
Cost	$	46,552	$	58,688
Accumulated amortization	(41,120)		(44,175)
Customer Relationships—Acquired	$	5,432	$	14,513
Customer Relationships—Other
Cost	$	15,955	$	8,988
Accumulated amortization	(7,204)		(5,733)
Customer Relationships—Other, net	$	8,751	$	3,255
Trademarks
Cost	$	7,040	$	7,570
Accumulated amortization	(3,508)		(2,972)
Trademarks, net	$	3,532	$	4,598

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

	Goodwill		Customer Relationships— Acquired & Non-Compete Agreements		Customer Relationships— Other		Trademarks
Balance at December 31, 2018	$	120,343	$	36,194	$	6,865	$	7,287
Additions	—		—		6,913		—
Amortization	—		(12,342)		(6,256)		(1,579)
Balance at December 31, 2019	$	120,343	$	23,852	$	7,522	$	5,708
Amortization	—		(9,339)		(4,267)		(1,110)
Balance at December 31, 2020	$	120,343	$	14,513	$	3,255	$	4,598
Additions	—		—		9,100		—
Adjustments	—		—		(27)		—
Amortization	—		(9,081)		(3,577)		(1,066)
Balance at December 31, 2021	$	120,343	$	5,432	$	8,751	$	3,532

Estimated future amortization expense for customer relationships and trademarks at December 31, 2021 is as follows (in thousands):

Year Ending December 31,
2022	$	9,227
2023	3,639
2024	2,830
2025	404
2026	404
> 5 years	1,211
Total	$	17,715