Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets Schedule

Intangible assets consist of the following:

	As of December 31, 2017
	Carrying Value		Accumulated  Amortization		Net Intangible
Amortizable intangible assets:
Product technology	$	19,459	$	10,885	$	8,574
Patents and trademarks	13,948		5,720		8,228
Customer relationships	5,889		1,685		4,204
Other	7,443		5,909		1,534
Total	$	46,739	$	24,199	$	22,540

	As of December 31, 2016
	Carrying Value		Accumulated  Amortization		Net Intangible
Amortizable intangible assets:
Product technology	$	15,700	$	7,614	$	8,086
Patents and trademarks	13,328		4,927		8,401
Customer relationships	5,466		837		4,629
Other	8,013		6,850		1,163
Total	$	42,507	$	20,228	$	22,279

Estimated Amortization Expense Schedule

The estimated amortization expense for each of the years 2018 through 2022 and thereafter is as follows:

Years ending December 31,	Amount
2018	$	4,022
2019	3,770
2020	3,311
2021	2,880
2022	2,015
Thereafter	6,542
	$	22,540