INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2022

INTANGIBLE ASSETS

INTANGIBLE ASSETS

6.    INTANGIBLE ASSETS

Intangible assets on the Company’s condensed consolidated balance sheets consist of the following (in thousands):

		March 31, 2022						December 31, 2021
		Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Life	Amount		Amortization		Value		Amount		Amortization		Value
Customer lists	5-18 years	$	93,997	$	(29,071)	$	64,926	$	94,079	$	(27,639)	$	66,440
Trade name	10 - 19 years		14,645		(6,162)		8,483		14,649		(5,927)		8,722
Design and technologies	10 - 15 years		34,177		(6,242)		27,935		34,241		(5,617)		28,624
Total		$	142,819	$	(41,475)	$	101,344	$	142,969	$	(39,183)	$	103,786

Amortization expense for intangible assets was $2,434 and $1,512 for the three months ended March 31, 2022 and 2021, respectively.

Estimated future intangible asset amortization expense as of March 31, 2022 is as follows (in thousands):

	Estimated
	Amortization Expense
Remainder of 2022	$	7,382
2023		9,856
2024		9,528
2025		9,510
2026		9,412
2027		8,966
Thereafter		46,690
Total estimated amortization expense	$	101,344