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Goodwill And Intangible Assets (Weighted Average Remaining Amortization Period) (Details)
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12 Months Ended |
|---|---|
|
Dec. 31, 2011
years
|
|
|
Acquired Methodologies/Technology [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining amortization period (in years) | 5.5 |
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Customer Relationships [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining amortization period (in years) | 7.5 |
|
Panel [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining amortization period (in years) | 3.4 |
|
Intellectual Property [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining amortization period (in years) | 9.2 |
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Trade Name [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Weighted average remaining amortization period (in years) | 2.2 |