Intangible Assets and Goodwill (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of intangible assets
Intangible Assets, Gross	$ 301,982	$ 301,982
Accumulated Amortization	(265,495)	(247,082)
Finite-lived intangible assets	34,887
In-process research and development	1,600
Intangible assets, net	36,487	54,900
Amortization expense for intangible assets	$ 18,413	17,058	$ 29,341
Minimum
Components of intangible assets
Useful life (in years)	6 months
Maximum
Components of intangible assets
Useful life (in years)	10 years
Existing technology
Components of intangible assets
Gross Carrying Amount	$ 263,789	262,789
Accumulated Amortization	(230,950)	(213,354)
Finite-lived intangible assets	$ 32,839	$ 49,435
Existing technology | Minimum
Components of intangible assets
Useful life (in years)	3 years	3 years
Existing technology | Maximum
Components of intangible assets
Useful life (in years)	10 years	10 years
Customer contracts and contractual relationships
Components of intangible assets
Gross Carrying Amount	$ 36,293	$ 36,293
Accumulated Amortization	(34,245)	(33,428)
Finite-lived intangible assets	$ 2,048	$ 2,865
Customer contracts and contractual relationships | Minimum
Components of intangible assets
Useful life (in years)	6 months	6 months
Customer contracts and contractual relationships | Maximum
Components of intangible assets
Useful life (in years)	10 years	10 years
Non-competition agreements
Components of intangible assets
Gross Carrying Amount	$ 300	$ 300
Accumulated Amortization	(300)	(300)
Finite-lived intangible assets	$ 0	$ 0
Useful life (in years)	3 years	3 years
In-process research and development
Components of intangible assets
In-process research and development	$ 1,600	$ 2,600
Payments and Ticketing business
Components of intangible assets
Disposal of intangible assets, noncurrent		$ 20,700