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Net Income Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Basic weighted-average shares outstanding	26,601	26,220
Effect of dilutive shares	794	637
Diluted weighted-average shares outstanding	27,395	26,857

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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