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Weighted Average Shares Outstanding - Summary Of Weighted Average Number of Shares (Detail)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Earnings Per Share [Abstract]    
Basic shares outstanding 23,868 23,762
Plus: Dilutive effect of ISOs 63 105
Plus: Dilutive effect of Restricted Grants 315 49
Diluted shares outstanding 24,246 23,916