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EMPLOYEE STOCK COMPENSATION - Summary of Stock Options Outstanding (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number of Shares (in shares) | shares | 186,973
Options Outstanding, Intrinsic Value | $ | $ 20,019
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 13.54
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 5 years 9 months 18 days
Options Exercisable, Number of Shares (in shares) | shares | 123,125
Options Exercisable, Intrinsic Value | $ | $ 16,238
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 13.67
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 5 years 6 months 1 day
$10.90 to $11.88 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 10.90
Upper range of exercise price (in usd per share) | $ 11.88
Options Outstanding, Number of Shares (in shares) | shares | 7,344
Options Outstanding, Intrinsic Value | $ | $ 17,699
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 10.90
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 5 years 6 months
Options Exercisable, Number of Shares (in shares) | shares | 6,240
Options Exercisable, Intrinsic Value | $ | $ 15,038
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 10.90
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 5 years 6 months
$11.88 to $12.86 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 11.88
Upper range of exercise price (in usd per share) | $ 12.86
Options Outstanding, Number of Shares (in shares) | shares | 0
Options Outstanding, Intrinsic Value | $ | $ 0
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 0.00
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 0 years
Options Exercisable, Number of Shares (in shares) | shares | 0
Options Exercisable, Intrinsic Value | $ | $ 0
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 0.00
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 0 years
$12.86 to $13.84 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 12.86
Upper range of exercise price (in usd per share) | $ 13.84
Options Outstanding, Number of Shares (in shares) | shares | 163,464
Options Outstanding, Intrinsic Value | $ | $ 2,320
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 13.44
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 5 years 13 months 21 days
Options Exercisable, Number of Shares (in shares) | shares | 100,720
Options Exercisable, Intrinsic Value | $ | $ 1,200
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 13.50
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 5 years 11 months 26 days
$13.84 to $14.82 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 13.84
Upper range of exercise price (in usd per share) | $ 14.82
Options Outstanding, Number of Shares (in shares) | shares | 0
Options Outstanding, Intrinsic Value | $ | $ 0
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 0.00
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 0 years
Options Exercisable, Number of Shares (in shares) | shares | 0
Options Exercisable, Intrinsic Value | $ | $ 0
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 0.00
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 0 years
$14.82 to $15.82 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 14.82
Upper range of exercise price (in usd per share) | $ 15.82
Options Outstanding, Number of Shares (in shares) | shares | 16,165
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) | 2 years 5 months 26 days
Options Exercisable, Number of Shares (in shares) | shares | 16,165
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) | 2 years 5 months 26 days

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