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Stockholders' Equity/(Deficit) - Stock Options Outstanding (Detail)
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Shares Outstanding | shares 375,283
Weighted Average Remaining Contractual Life in Years 5 years 9 months 15 days
Weighted Average Exercise Price $ 24.60
Range One [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (Minimum) 12.48
Range of Exercise Prices (Maximum) $ 12.48
Number of Shares Outstanding | shares 141,833
Weighted Average Remaining Contractual Life in Years 9 years
Weighted Average Exercise Price $ 12.48
Range Two [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (Minimum) 26.40
Range of Exercise Prices (Maximum) $ 26.40
Number of Shares Outstanding | shares 79,370
Weighted Average Remaining Contractual Life in Years 8 years 4 days
Weighted Average Exercise Price $ 26.40
Range Three [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (Minimum) 32.76
Range of Exercise Prices (Maximum) $ 34.68
Number of Shares Outstanding | shares 132,413
Weighted Average Remaining Contractual Life in Years 1 year 7 months 2 days
Weighted Average Exercise Price $ 33.96
Range Four [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (Minimum) 39.00
Range of Exercise Prices (Maximum) $ 46.80
Number of Shares Outstanding | shares 21,667
Weighted Average Remaining Contractual Life in Years 2 years 2 months 27 days
Weighted Average Exercise Price $ 41.04