Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Intangible assets
Average Remaining Amortization Period		6 years 3 months 18 days
Net Amount, Definite-lived intangible assets		$ 61,518
Total Gross Intangible Assets		508,969	$ 550,119
Accumulated Amortization and Impairment		447,451	464,970
Total Net Intangible Assets		$ 61,518	85,149
Impairment charges, Definite-lived intangible assets	$ 216,400
In-process R&D
Intangible assets
Gross Carrying Amount, Indefinite-lived intangible assets			13,710
Accumulated Amortization and Impairment, Indefinite-lived intangible assets			10,530
Net Amount, Indefinite-lived intangible assets			3,180
Impairment charges, Indefinite-lived intangible assets	$ 35,900
Technology
Intangible assets
Average Remaining Amortization Period		5 years
Gross Carrying Amount, Definite-lived intangible assets		$ 327,908	337,218
Accumulated Amortization and Impairment, Definite-lived intangible assets		291,766	290,808
Net Amount, Definite-lived intangible assets		$ 36,142	46,410
Customer relationships
Intangible assets
Average Remaining Amortization Period		9 years 2 months 12 days
Gross Carrying Amount, Definite-lived intangible assets		$ 146,465	164,595
Accumulated Amortization and Impairment, Definite-lived intangible assets		126,764	136,126
Net Amount, Definite-lived intangible assets		$ 19,701	28,469
Trademarks and tradenames
Intangible assets
Average Remaining Amortization Period		4 years 4 months 24 days
Gross Carrying Amount, Definite-lived intangible assets		$ 30,910	30,910
Accumulated Amortization and Impairment, Definite-lived intangible assets		25,256	23,899
Net Amount, Definite-lived intangible assets		$ 5,654	7,011
Other Intangible Assets
Intangible assets
Average Remaining Amortization Period		1 year 1 month 6 days
Gross Carrying Amount, Definite-lived intangible assets		$ 3,686	3,686
Accumulated Amortization and Impairment, Definite-lived intangible assets		3,665	3,607
Net Amount, Definite-lived intangible assets		$ 21	$ 79