3. Goodwill and Intangible Assets

At December 31, 2018 and 2017, goodwill is the only intangible asset that is not subject to amortization. The following table summarizes intangible assets with determinable useful lives by major category as of December 31, 2018 and 2017:

			2018					2017
(In thousands except weighted average amortization years)	Weighted Average Amortization Years		Cost		Accumulated Amortization			Cost		Accumulated Amortization

Technological know-how		18.9	$	14,570	$	(6,768	)	$	7,510	$	(6,505	)
Customer relationships		17.4		8,761		(5,673	)		6,869		(5,244	)
Patents, trademarks, non-compete agreements, and other		15.4		15,861		(7,884	)		10,264		(5,683	)

Total finite-lived intangibles		17.2	$	39,192	$	(20,325	)	$	24,643	$	(17,432	)

Amortization of intangible assets was $2.3 million in 2018; $1.6 million in 2017; and $1.3 million in 2016. Estimated amortization expense, for the five years subsequent to December 31, 2018, is $2.3 million in 2019 and 2020; $2.1 million in 2021; $2.0 million in 2022; and $1.7 million in 2023.

The changes in goodwill for the years ended December 31, 2018 and 2017, by reportable business segment, were as follows:

(In thousands)	Flavors & Fragrances			Color			Asia Pacific		Corporate & Other		Consolidated
Balance as of December 31, 2016	$	109,369		$	272,006		$	2,193	$	-	$	383,568
Currency translation impact		5,624			18,883			920		-		25,427
Balance as of December 31, 2017		114,993			290,889			3,113		-		408,995
Currency translation impact		(891	)		(8,269	)		52		-		(9,108	)
Acquisitions		-			7,434			-		8,854		16,288
Balance as of December 31, 2018	$	114,102		$	290,054		$	3,165	$	8,854	$	416,175