Intangible Assets and Liabilities - Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 928,422	$ 1,000,037	$ 979,814
Accumulated amortization	(835,893)	(867,082)
Finite-lived intangible assets, Net	92,529	132,955
Finite-lived intangible liabilities, gross	(23,900)	(23,900)	$ (23,900)
Finite-lived intangible liabilities, accumulated accretion	23,441	21,479
Finite-lived intangible liabilities, net	(459)	(2,421)
Core-developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	505,429	525,051
Accumulated amortization	(491,047)	(498,113)
Finite-lived intangible assets, Net	14,382	26,938
Customer contracts and relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	336,421	383,245
Accumulated amortization	(261,043)	(280,497)
Finite-lived intangible assets, Net	75,378	102,748
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	74,551	79,716
Accumulated amortization	(72,133)	(76,912)
Finite-lived intangible assets, Net	2,418	2,804
Other
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	12,021	12,025
Accumulated amortization	(11,670)	(11,560)
Finite-lived intangible assets, Net	$ 351	$ 465