Intangible Assets and Liabilities Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Intangible Assets [Line Items]
Intangible assets, Accumulated (Amortization) Accretion	$ (852,495)	$ (840,193)
Intangible assets, Net	50,408
Intangible assets, Gross	902,903	905,134	$ 881,309	$ 928,422
Intangible assets, Net	50,408	64,941
Intangible liabilities, Gross	(23,900)	(23,900)	$ (23,900)	$ (23,900)
Intangible liabilities, Accumulated (Amortization) Accretion	23,900	23,900
Intangible liabilities, Net	0	0
Core-developed technology [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	497,988	498,601
Intangible assets, Accumulated (Amortization) Accretion	(494,989)	(492,782)
Intangible assets, Net	2,999	5,819
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	320,995	322,360
Intangible assets, Accumulated (Amortization) Accretion	(275,508)	(265,503)
Intangible assets, Net	45,487	56,857
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	71,903	72,156
Intangible assets, Accumulated (Amortization) Accretion	(70,099)	(70,101)
Intangible assets, Net	1,804	2,055
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	12,017	12,017
Intangible assets, Accumulated (Amortization) Accretion	(11,899)	(11,807)
Intangible assets, Net	$ 118	$ 210