Intangible Assets, Net and Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Identifiable Intangible Assets

	December 31,
	2017			2016
Intangible assets subject to amortization:
Patents and purchased technology	$	14,198		$	14,198
Customer relationships	23,000			23,000
Gross carrying amount	37,198			37,198
Accumulated amortization:
Patents and purchased technology	(10,651		)	(9,321		)
Customer relationships	(12,413		)	(9,860		)
Accumulated amortization	(23,064		)	(19,181		)
Net carrying amount	14,134			18,017
Intangible assets not subject to amortization	115,421			115,421
Intangible assets, net	$	129,555		$	133,438