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Property and Equipment - Schedule of Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
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Dec. 31, 2011
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|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 98,657 | $ 84,502 |
| Less accumulated depreciation | (64,917) | (51,876) |
| Property and equipment, net | 33,740 | 32,626 |
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Computers and other related equipment [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 40,016 | 33,680 |
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Purchased and internally developed software [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 52,616 | 45,074 |
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Furniture and fixtures [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 2,610 | 2,380 |
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Leasehold improvements [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 3,415 | $ 3,368 |