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Reconciliation of Average Share Amounts used to Compute Both Basic and Diluted Loss Per Share (Detail) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Weighted average share outstanding:
Basic weighted average shares outstanding	39,126	33,495	38,323	33,420
Add: Dilutive effect of stock options, restricted stock awards and common stock warrants	1,586	810		762
Diluted weighted average shares outstanding	40,712	34,305	38,323	34,182

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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

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-Section 50

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- Definition

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.

+ References

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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