Intangible Assets and Liabilities Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Intangible Assets [Line Items]
Intangible assets, Accumulated (Amortization) Accretion	$ (868,896)	$ (870,896)
Intangible assets, Net	57,123
Intangible assets, Gross	926,019	917,178	$ 910,063	$ 905,134
Intangible assets, Net	57,123	46,282
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	512,787	502,010
Intangible assets, Accumulated (Amortization) Accretion	(498,434)	(499,571)
Intangible assets, Net	14,353	2,439
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	328,438	329,688
Intangible assets, Accumulated (Amortization) Accretion	(287,386)	(287,653)
Intangible assets, Net	41,052	42,035
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	72,775	73,461
Intangible assets, Accumulated (Amortization) Accretion	(71,130)	(71,740)
Intangible assets, Net	1,645	1,721
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	12,019	12,019
Intangible assets, Accumulated (Amortization) Accretion	(11,946)	(11,932)
Intangible assets, Net	$ 73	$ 87