| Schedule of Earnings Per Share Reconciliation [Table Text Block] |
| | Computation Of Net Income (Loss) Per Share | | | Year Ended December 31, 2012 | | | (amounts in thousands, except share and per share data) | | | | | | | | Net Income (Loss) | | | Net Income (Loss) | | Shares | | Per Share | | | | | | | | | | | Basic net income (loss) per common share: | $ | 11,268 | | 36,906,468 | | $ | 0.31 | | Impact of equity awards | | | | 903,178 | | | | | | | | | | | | | | Diluted net income (loss) per common share: | $ | 11,268 | | 37,809,646 | | $ | 0.30 |
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| | Computation Of Net Income (Loss) Per Share | | | Year Ended December 31, 2011 | | | (amounts in thousands, except share and per share data) | | | | | | | | Net Income (Loss) | | | Net Income (Loss) | | Shares | | Per Share | | | | | | | | | | | Basic net income (loss) per common share: | $ | 66,277 | | 36,369,410 | | $ | 1.82 | | Impact of equity awards | | | | 1,394,555 | | | | | | | | | | | | | | Diluted net income (loss) per common share: | $ | 66,277 | | 37,763,965 | | $ | 1.76 |
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| | Computation Of Net Income (Loss) Per Share | | | Year Ended December 31, 2010 | | | (amounts in thousands, except share and per share data) | | | | | | | | Net Income (Loss) | | | Net Income (Loss) | | Shares | | Per Share | | | | | | | | | | | Basic net income (loss) per common share: | $ | 46,436 | | 35,712,026 | | $ | 1.30 | | Impact of equity awards | | | | 1,967,360 | | | | | | | | | | | | | | Diluted net income (loss) per common share: | $ | 46,436 | | 37,679,386 | | $ | 1.23 |
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| Equity Award Impact Schedule |
| | | | Impact Of Equity Awards | | | | | | Years Ended December 31, | | | | 2012 | | 2011 | | 2010 | | | | | (amounts in thousands, except per share data) | | Dilutive or anti-dilutive for all potentially | | | | | | | | | | | | dilutive equivalent shares | | dilutive | | dilutive | | dilutive | | Excluded shares as anti-dilutive under | | | | | | | | | | | | the treasury stock method | | | | | | | | | | | | | Price range of options excluded: from | | $ | 6.43 | | $ | 8.21 | | $ | 9.63 | | | | Price range of options excluded: to | | $ | 48.21 | | $ | 48.21 | | $ | 48.21 | | | | Options excluded | | | 46 | | | 54 | | | 66 | | | | RSUs with service conditions | | | 939 | | | 945 | | | 43 | | | | RSUs with service and market conditions | | | 200 | | | 200 | | | 200 | | | | Total RSUs excluded | | | 1,139 | | | 1,145 | | | 243 | |
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