7. Other Intangible Assets

The following is a summary of the Company’s other intangible assets:



		Gross	Less		Net
		Carrying	Accumulated		Carrying
		Amount	Amortization		Amount
December 31, 2018
Indefinite-lived intangibles:
Trademark and tradenames	$	77,600	$	-	$	77,600
Amortizable intangibles:
Dealer network		80,000		59,000		21,000
Customer relationships		80,920		16,607		64,313
Patents		21,136		11,974		9,162
Noncompete agreements		8,640		7,877		763
Trademarks		5,459		3,619		1,840
Backlog		1,900		1,900		-
License		20		20		-
Amortizable intangibles, net		198,075		100,997		97,078
Total	$	275,675	$	100,997	$	174,678

		Gross	Less		Net
		Carrying	Accumulated		Carrying
		Amount	Amortization		Amount
December 31, 2017
Indefinite-lived intangibles:
Trademark and tradenames	$	77,600	$	-	$	77,600
Amortizable intangibles:
Dealer network		80,000		55,000		25,000
Customer relationships		80,920		11,304		69,616
Patents		21,136		10,721		10,415
Noncompete agreements		8,640		7,055		1,585
Trademarks		5,459		3,525		1,934
Backlog		1,900		1,900		-
License		20		20		-
Amortizable intangibles, net		198,075		89,525		108,550
Total	$	275,675	$	89,525	$	186,150

Amortization expense for intangible assets was $11,472, $11,401 and $10,596 for the years ended December 31, 2018, 2017 and 2016, respectively. Estimated amortization expense for the next five years is as follows:



2019	$	10,954
2020		10,932
2021		10,670
2022		10,520
2023		10,520

The weighted average remaining life for intangible assets is 10.5 years at December 31, 2018.

The Company relies on a combination of patents, trade secrets and trademarks to protect certain of the proprietary aspects of its business and technology. In the year ended December 31, 2017, the Company received a settlement resulting from an ongoing lawsuit with one of its competitors that had been ordered to stop using the Company’s intellectual property. Under the settlement agreement the Company received $1,275 as part of defending its intellectual property. In the year ended December 31, 2016, the Company received a settlement resulting from an ongoing lawsuit with another of its competitors. Previously under the same lawsuit the competitor was required to stop using the Company’s intellectual property. Under the settlement agreement the Company received $10,050 as part of defending its intellectual property. The proceeds of the lawsuits are included on the Consolidated Statements of Operations and Comprehensive Income as Litigation proceeds.