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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		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Weighted average share outstanding:
Basic weighted average shares outstanding	39,263	33,446	37,985	33,383
Add: Dilutive effect of stock options, restricted stock awards and common stock warrants		808		737
Diluted weighted average shares outstanding	39,263	34,254	37,985	34,120

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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- Definition

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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