Company Operations and Summary of Significant Accounting Policies - Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Goodwill And Intangible Assets [Line Items]
Goodwill Gross	$ 84,197	$ 84,212
Accumulated Amortization on Goodwill	(3,449)	(3,449)
Goodwill Net	80,748	80,763
Weighted-Average Useful Life (years)	3 years 6 months
Accumulated Amortization	(69,036)	(51,618)
Total	41,200
Gross intangible asset including Goodwill	191,674	194,643
Net intangible asset including Goodwill	122,638	143,025
In Process Research and Development [Member]
Goodwill And Intangible Assets [Line Items]
Accumulated Amortization	0	0
Gross Assets	690	2,260
Net	690	2,260
Purchased technology [Member]
Goodwill And Intangible Assets [Line Items]
Weighted-Average Useful Life (years)	8 years 4 months 24 days
Gross Assets	51,870	51,870
Accumulated Amortization	(28,570)	(22,287)
Total	23,300	29,583
Customer relationships [Member]
Goodwill And Intangible Assets [Line Items]
Weighted-Average Useful Life (years)	7 years 6 months
Gross Assets	7,214	7,250
Accumulated Amortization	(3,978)	(2,954)
Total	3,236	4,296
License agreements [Member]
Goodwill And Intangible Assets [Line Items]
Weighted-Average Useful Life (years)	5 years 10 months 24 days
Gross Assets	34,324	34,330
Accumulated Amortization	(30,050)	(21,374)
Total	4,274	12,956
Patent and trademark costs [Member]
Goodwill And Intangible Assets [Line Items]
Weighted-Average Useful Life (years)	12 years 3 months 18 days
Gross Assets	10,530	10,530
Accumulated Amortization	(1,725)	(861)
Total	8,805	9,669
Software development costs [Member]
Goodwill And Intangible Assets [Line Items]
Weighted-Average Useful Life (years)	5 years
Gross Assets	2,849	4,191
Accumulated Amortization	(1,264)	(693)
Total	$ 1,585	$ 3,498