Intangible Assets and Liabilities Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Intangible Assets [Line Items]
Intangible assets, Accumulated (Amortization) Accretion	$ (828,086)	$ (835,893)
Intangible assets, Net	78,030
Intangible assets, Gross	906,116	928,422	$ 990,955	$ 1,000,037
Intangible assets, Net	78,030	92,529
Intangible liabilities, Gross	(23,900)	(23,900)	$ (23,900)	$ (23,900)
Intangible liabilities, Accumulated (Amortization) Accretion	23,670	23,441
Intangible liabilities, Net	(230)	(459)
Core-developed technology [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	499,042	505,429
Intangible assets, Accumulated (Amortization) Accretion	(489,108)	(491,047)
Intangible assets, Net	9,934	14,382
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	322,882	336,421
Intangible assets, Accumulated (Amortization) Accretion	(257,302)	(261,043)
Intangible assets, Net	65,580	75,378
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	72,175	74,551
Intangible assets, Accumulated (Amortization) Accretion	(69,938)	(72,133)
Intangible assets, Net	2,237	2,418
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Intangible assets, Gross	12,017	12,021
Intangible assets, Accumulated (Amortization) Accretion	(11,738)	(11,670)
Intangible assets, Net	$ 279	$ 351