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Weighted Average Common Shares - Summary of Weighted Average Numbers of Common Shares Used to Compute Basic and Diluted Net Income (Loss) Per Share (Detail) - shares
shares in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
 [1]
Dec. 31, 2013
 [1]
Earnings Per Share [Abstract]      
Basic 67,860 67,173 66,738
Common stock equivalents 468    
Diluted common shares outstanding 68,328 67,173 66,738
[1] Due to the fact that we reported a loss from continuing operations for the years ended December 31, 2014 and 2013, potential common stock equivalents were excluded from the diluted common shares outstanding calculation. Per FASB ASC Topic 260 – Earnings per Share, an entity that reports discontinued operations shall use income or loss from continuing operations as the benchmark for calculating diluted common shares outstanding, and as such, we have zero common stock equivalents since these shares would have an anti-dilutive effect on our net loss per share for the years ended December 31, 2014 and 2013.