INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2022

INTANGIBLE ASSETS

INTANGIBLE ASSETS

7.    INTANGIBLE ASSETS

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

		June 30, 2022						December 31, 2021
		Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Life	Amount		Amortization		Value		Amount		Amortization		Value
Customer lists	5-18 years	$	112,875	$	(30,446)	$	82,429	$	94,079	$	(27,639)	$	66,440
Trade name	10 - 19 years		15,287		(6,347)		8,940		14,649		(5,927)		8,722
Design and technologies	10 - 15 years		41,312		(6,738)		34,574		34,241		(5,617)		28,624
Total		$	169,474	$	(43,531)	$	125,943	$	142,969	$	(39,183)	$	103,786

Intangible assets resulting from the acquisition of FPH, ThinGap and Airex were $28,611 (Note 2). The intangible assets acquired consist of customer lists, technology and tradenames.

Amortization expense for intangible assets was $2,645 and $1,511 for the three months ended June 30, 2022 and 2021, respectively. For the six months ended June 30, 2022 and 2021, amortization expense was $5,079 and $3,023, respectively.

Estimated future intangible asset amortization expense as of June 30, 2022 is as follows (in thousands):

	Estimated
	Amortization Expense
Remainder of 2022	$	6,133
2023		12,269
2024		11,944
2025		11,928
2026		11,831
2027		11,388
Thereafter		60,450
Total estimated amortization expense	$	125,943