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Weighted Average Shares Outstanding - Summary of Weighted Average Number of Shares (Detail)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Earnings Per Share [Abstract]        
Basic shares outstanding 26,773 23,901 25,705 23,883
Plus: Dilutive effect of ISOs 111 62 116 62
Plus: Dilutive effect of Restricted grants 277 353 278 353
Diluted shares outstanding 27,161 24,316 26,099 24,298