Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Intangible assets
Weighted Average Remaining Amortization Period	8 years 10 months 24 days
Gross Carrying Amount	$ 204,599	$ 282,114
Accumulated Amortization and Impairment	146,221	150,440
Total Net Intangible Assets	58,378	131,674
Estimated aggregate amortization expense
2017	11,470
2018	9,893
2019	8,608
2020	7,530
2021	5,491
Thereafter	12,486
Total	55,478
Indefinite-lived trademark
Intangible assets
Gross Carrying Amount	2,900	2,900
Total Net Intangible Assets	$ 2,900	2,900
Technology
Intangible assets
Weighted Average Remaining Amortization Period	7 years 3 months 18 days
Gross Carrying Amount	$ 149,198	222,358
Accumulated Amortization and Impairment	113,904	120,496
Total Net Intangible Assets	$ 35,294	101,862
Customer relationships
Intangible assets
Weighted Average Remaining Amortization Period	11 years 10 months 24 days
Gross Carrying Amount	$ 47,885	47,885
Accumulated Amortization and Impairment	28,659	22,470
Total Net Intangible Assets	$ 19,226	25,415
Trademark and tradenames
Intangible assets
Weighted Average Remaining Amortization Period	4 years 3 months 18 days
Gross Carrying Amount	$ 2,590	2,730
Accumulated Amortization and Impairment	1,948	1,937
Total Net Intangible Assets	$ 642	793
Other
Intangible assets
Weighted Average Remaining Amortization Period	2 years 10 months 24 days
Gross Carrying Amount	$ 2,026	6,241
Accumulated Amortization and Impairment	1,710	5,537
Total Net Intangible Assets	$ 316	$ 704