Note 7. Goodwill and Intangible Assets

Goodwill at December 31, 2018 decreased to $55,816,000 from $56,429,000 at December 31, 2017 due to foreign currency fluctuations of $721,000. Goodwill in 2017 includes additions of $5,885,000 and $23,748,000 as a result of the acquisitions of OGIO completed in January 2017 and TravisMathew completed in August 2017, respectively. The Company's goodwill is reported within the Golf Clubs and Gear, Accessories and Other operating segments (see Note 18).

In accordance with ASC Topic 350, “Intangibles—Goodwill and Other,” the Company’s goodwill and certain intangible assets are not amortized, but are subject to an annual impairment test. The following sets forth the intangible assets by major asset class:



	Useful Life (Years)	December 31, 2018							December 31, 2017
	Useful Life (Years)	Gross		Accumulated Amortization			Net Book Value		Gross		Accumulated Amortization			Net Book Value
				(In thousands)							(In thousands)
Indefinite-lived:
Trade name, trademark and trade dress and other	NA	$	218,364		$	—	$	218,364	$	218,364		$	—	$	218,364
Amortizing:
Patents	2-16	31,581			31,543		38		31,581			31,491		90
Customer and distributor relationships, and other	1-9	15,780			9,490		6,290		15,780			8,476		7,304
Total intangible assets		$	265,725		$	41,033	$	224,692	$	265,725		$	39,967	$	225,758

Aggregate amortization expense on intangible assets was approximately $1,066,000, $546,000 and $71,000 for the years ended December 31, 2018, 2017 and 2016, respectively. Amortization expense related to intangible assets at December 31, 2018 in each of the next five fiscal years and beyond is expected to be incurred as follows (in thousands):



2019	$	1,053
2020	966
2021	910
2022	734
2023	595
Thereafter	2,069
	$	6,327