Intangible Assets, Net and Goodwill (Schedule of Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Summary of Identifiable Intangible Assets [Line Items]
Gross carrying amount	$ 37,198	$ 37,198	$ 37,198
Accumulated amortization	(37,198)	(36,511)	(36,098)
Net carrying amount	0	687	1,100
Intangible assets not subject to amortization	79,221	79,221	79,221
Intangible Assets, Net (Excluding Goodwill), Total	79,221	79,908	80,321
Patents And Purchased Technology
Summary of Identifiable Intangible Assets [Line Items]
Gross carrying amount	14,198	14,198	14,198
Accumulated amortization	(14,198)	(14,198)	(14,198)
Customer Relationships
Summary of Identifiable Intangible Assets [Line Items]
Gross carrying amount	23,000	23,000	23,000
Accumulated amortization	$ (23,000)	$ (22,313)	$ (21,900)