Intangible Assets, Net and Goodwill (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Identifiable Intangible Assets

	December 31,
(in thousands)	2018			2017
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	(11,981		)	(10,651		)
Customer relationships	(14,063		)	(12,413		)
Accumulated amortization	(26,044		)	(23,064		)
Net carrying amount	11,154			14,134
Intangible assets not subject to amortization	115,421			115,421
Intangible assets, net	$	126,575		$	129,555