Balance Sheet Details - Property and Equipment, net (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
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Property, Plant and Equipment [Line Items] | |||
Property and equipment, gross | $ 77,410 | $ 66,148 | |
Accumulated depreciation and amortization | (56,327) | (50,018) | |
Property and equipment, net | 21,083 | 16,130 | 11,815 |
Computer equipment and purchased software [Member]
|
|||
Property, Plant and Equipment [Line Items] | |||
Property and equipment, gross | 31,582 | 28,477 | |
Test Equipment [Member]
|
|||
Property, Plant and Equipment [Line Items] | |||
Property and equipment, gross | 37,595 | 29,849 | |
Furniture and fixtures [Member]
|
|||
Property, Plant and Equipment [Line Items] | |||
Property and equipment, gross | 1,470 | 1,480 | |
Leasehold improvements [Member]
|
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Property, Plant and Equipment [Line Items] | |||
Property and equipment, gross | $ 6,763 | $ 6,342 |