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EMPLOYEE STOCK COMPENSATION - Summary of Stock Options Outstanding (Detail)
 12 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options Outstanding, Number of Shares (in shares) | shares 960,879
Options Outstanding, Intrinsic Value | $ $ 1,723,207
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) $ 12.86
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) 6 years 10 months 27 days
Options Exercisable, Number of Shares (in shares) | shares 394,613
Options Exercisable, Intrinsic Value | $ $ 795,962
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 12.70
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) 6 years 1 month 22 days
$10.89 to $11.87  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower range of exercise price (in usd per share) $ 10.89
Upper range of exercise price (in usd per share) $ 11.87
Options Outstanding, Number of Shares (in shares) | shares 177,683
Options Outstanding, Intrinsic Value | $ $ 583,747
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) $ 11.33
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) 6 years 5 months 16 days
Options Exercisable, Number of Shares (in shares) | shares 125,529
Options Exercisable, Intrinsic Value | $ $ 404,201
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 11.40
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) 5 years 11 months 24 days
$11.87 to $12.85  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower range of exercise price (in usd per share) $ 11.87
Upper range of exercise price (in usd per share) $ 12.85
Options Outstanding, Number of Shares (in shares) | shares 285,000
Options Outstanding, Intrinsic Value | $ $ 675,700
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) $ 12.25
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) 7 years 11 months 28 days
Options Exercisable, Number of Shares (in shares) | shares 128,327
Options Exercisable, Intrinsic Value | $ $ 305,752
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 12.24
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) 7 years 5 months 26 days
$12.85 to $13.83  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower range of exercise price (in usd per share) $ 12.85
Upper range of exercise price (in usd per share) $ 13.83
Options Outstanding, Number of Shares (in shares) | shares 298,696
Options Outstanding, Intrinsic Value | $ $ 402,016
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) $ 13.27
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) 8 years 2 months 5 days
Options Exercisable, Number of Shares (in shares) | shares 40,000
Options Exercisable, Intrinsic Value | $ $ 60,400
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 13.11
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) 7 years 4 months 30 days
$13.83 to $14.81  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower range of exercise price (in usd per share) $ 13.83
Upper range of exercise price (in usd per share) $ 14.81
Options Outstanding, Number of Shares (in shares) | shares 166,622
Options Outstanding, Intrinsic Value | $ $ 61,744
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) $ 14.25
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) 3 years 6 months 7 days
Options Exercisable, Number of Shares (in shares) | shares 67,879
Options Exercisable, Intrinsic Value | $ $ 25,609
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 14.24
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) 3 years 5 months 16 days
$14.81 to $15.81  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower range of exercise price (in usd per share) $ 14.81
Upper range of exercise price (in usd per share) $ 15.81
Options Outstanding, Number of Shares (in shares) | shares 32,878
Options Outstanding, Intrinsic Value | $ $ 0
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) $ 15.81
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) 5 years 5 months 30 days
Options Exercisable, Number of Shares (in shares) | shares 32,878
Options Exercisable, Intrinsic Value | $ $ 0
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 15.81
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) 5 years 5 months 30 days