Other Intangible Assets

12 Months Ended

Dec. 31, 2020

5.	Other Intangible Assets

Other intangible assets consist of the following (U.S. dollars in thousands):

	Carrying Amount at December 31,
	2020		2019
Indefinite life intangible assets:
Trademarks and trade names	$	24,599	$	24,599
Other indefinite lived intangibles		3,763		3,763
	$	28,362	$	28,362

	December 31, 2020				December 31, 2019
Finite life intangible assets:	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Weighted-average Amortization Period
Scanner technology	$	40,716	$	40,716	$	46,482	$	45,724	18 years
Developed technology		32,546		21,680		22,500		20,856	16 years
Sales force network		11,598		11,598		11,598		11,598	15 years
Trademarks		6,145		2,938		5,938		2,462	11 years
Other		71,095		23,998		92,331		46,250	10 years
	$	162,100	$	100,930	$	178,849	$	126,890	14 years

Amortization of finite-life intangible assets totaled $9.8 million, $13.4 million and $18.3 million for the years ended December 31, 2020, 2019 and 2018, respectively.

The estimated annual amortization expense for each of the five succeeding fiscal years are as follows (U.S. dollars in thousands):

Year Ending December 31,
2021	$	11,227
2022		10,090
2023		9,495
2024		8,512
2025		7,420

Indefinite life intangible assets are not amortized, rather they are subject to annual impairment tests. Annual impairment tests were completed resulting in no impairment charges for any of the periods shown. Finite life intangibles are amortized over their useful lives unless circumstances occur that cause the Company to revise such lives or review such assets for impairment.