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Net Income(Loss) Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Basic weighted-average shares outstanding (in shares)	26,424	24,162	26,322	24,090
Effect of dilutive shares	0	444	676	455
Diluted weighted-average shares outstanding (in shares)	26,424	24,606	26,999	24,545

X

- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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