Goodwill and Intangible Assets

Our intangible assets as of December 31 were comprised of the following:



	December 31, 2019
	Weighted- Average Amortization Period	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Definite-lived intangible assets:
Trademarks/Tradenames	23 years	$	11,553	$	(4,276	)	$	7,277
Customer relationships	15 years	15,025		(6,574		)	8,451
Technical know-how	5 years	9,790		(571		)	9,219
Covenant not to compete	5 years	330		(19		)	311
		$	36,698	$	(11,440	)	$	25,258



	December 31, 2018
	Weighted- Average Amortization Period	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Definite-lived intangible assets:
Trademarks/Tradenames	23 years	$	8,346	$	(3,888	)	$	4,458
Customer relationships	15 years	14,022		(5,680		)	8,342
		$	22,368	$	(9,568	)	$	12,800

The aggregate intangible asset amortization expense was $2.0 million for the fiscal year ended December 31, 2019 and $1.3 million for each of the fiscal years ended December 31, 2018 and 2017. The estimated intangible asset amortization expense for each of the five succeeding fiscal years ending after December 31, 2019 is $3.5 million for years 2020 through 2023 and $2.9 million for the year through December 31, 2024.

The changes in the carrying amounts of goodwill for the years ended December 31 are as follows:



	2019			2018
Balance - Beginning of the year	$	7,576		$	8,045
FSE Acquisition	20,365			—
Currency translation adjustment	(125		)	(469		)
Balance - End of the year	$	27,816		$	7,576