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Stock-Based Compensation (Summary Of Stock-Based Compensation Expense) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock-based compensation expense | $ 2,191 | $ 1,991 | $ 4,303 | $ 3,804 |
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Stock Options [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock-based compensation expense | 869 | 885 | 1,777 | 1,727 |
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Restricted Stock Units [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock-based compensation expense | $ 1,322 | $ 1,106 | $ 2,526 | $ 2,077 |