Goodwill and Intangible Assets - Intangible Assets by Major Asset Class (Detail) - USD ($)
$ in Thousands |
9 Months Ended |
|
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Gross |
$ 128,152
|
|
$ 128,132
|
| Accumulated Amortization |
39,409
|
|
39,350
|
| Net Book Value |
88,743
|
|
88,782
|
| Aggregate amortization expense on intangible assets |
59
|
$ 38
|
|
| Patents |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Gross |
31,581
|
|
31,581
|
| Accumulated Amortization |
31,428
|
|
31,389
|
| Net Book Value |
$ 153
|
|
192
|
| Patents | Minimum |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Useful Life (years) |
2 years
|
|
|
| Patents | Maximum |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Useful Life (years) |
16 years
|
|
|
| Developed technology and other |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Gross |
$ 7,981
|
|
7,961
|
| Accumulated Amortization |
7,981
|
|
7,961
|
| Net Book Value |
$ 0
|
|
0
|
| Developed technology and other | Minimum |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Useful Life (years) |
1 year
|
|
|
| Developed technology and other | Maximum |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Useful Life (years) |
9 years
|
|
|
| Trade name, trademark and trade dress and other |
|
|
|
| Intangible Assets By Major Class [Line Items] |
|
|
|
| Gross |
$ 88,590
|
|
88,590
|
| Net Book Value |
$ 88,590
|
|
$ 88,590
|