Note 8. Goodwill and Intangible Assets

Goodwill at March 31, 2019 increased to $209,887,000 from $55,816,000 at December 31, 2018. This $154,071,000 increase was primarily due to the Jack Wolfskin acquisition in January 2019 (see Note 4), combined with foreign currency fluctuations, which were nominal for the three months ended March 31, 2019. The Company's goodwill is reported in the Golf Equipment and Apparel, Gear and Other operating segments (see Note 18).

In accordance with ASC Topic 350, “Intangibles—Goodwill and Other,” the Company’s goodwill and non-amortizing intangible assets are subject to an annual impairment test or more frequently when impairment indicators are present. There were no impairment charges recognized during the three months ended March 31, 2019. The following sets forth the intangible assets by major asset class (dollars in thousands):



	Useful Life (Years)	March 31, 2019							December 31, 2018
	Useful Life (Years)	Gross		Accumulated Amortization			Net Book Value		Gross		Accumulated Amortization			Net Book Value
Non-Amortizing:
Trade name, trademark and trade dress and other	NA	$	453,942		$	—	$	453,942	$	218,364		$	—	$	218,364
Amortizing:
Patents	2-16	31,581			31,556		25		31,581			31,543		38
Distributor, customer relationships and other	1-10	53,921			10,697		43,224		15,780			9,490		6,290
Total intangible assets		$	539,444		$	42,253	$	497,191	$	265,725		$	41,033	$	224,692

Aggregate amortization expense on intangible assets was approximately $1,220,000 and $267,000 for the three months ended March 31, 2019 and 2018, respectively.

Amortization expense related to intangible assets at March 31, 2019 in each of the next five fiscal years and beyond is expected to be incurred as follows (in thousands):



Remainder of 2019	$	3,647
2020	4,780
2021	4,724
2022	4,548
2023	4,409
Thereafter	21,141
	$	43,249