Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

6. Goodwill and Intangible Assets

Goodwill represents the excess of the purchase price of an acquired business over the estimated fair values of the underlying net tangible and intangible assets. Goodwill is allocated to the Company’s one reportable segment, which is its only reporting unit.

The Company’s intangible assets, net consisted of the following:

		March 31, 2021							December 31, 2020
	Useful life			Accumulated							Accumulated
	(years)	Cost		amortization			Net		Cost		amortization			Net
Customer lists	5 - 15	$	113,357	$	(63,543	)	$	49,814	$	113,357	$	(60,934	)	$	52,423
Patents and    technology	3 - 10		23,424		(15,847	)		7,577		23,424		(15,288	)		8,136
Trade names and    trademarks	1 - 2		3,003		(3,003	)		—		3,003		(3,003	)		—
		$	139,784	$	(82,393	)	$	57,391	$	139,784	$	(79,225	)	$	60,559

At March 31, 2021, the weighted-average amortization period for the intangible assets was 10.5 years. At March 31, 2021, the weighted-average amortization periods for customer lists, patents and technology and trade names and trademarks were 10.9, 9.3 and 1.2 years, respectively.

Amortization expense for the three months ended March 31, 2021 and 2020 was $3,168 and $3,184, respectively.

Estimated future amortization expense for intangible assets as of March 31, 2021 was as follows:

	Amount
2021 (remaining)	$	9,057
2022		11,686
2023		11,408
2024		11,122
2025		4,472
2026		3,138
Thereafter		6,508
	$	57,391