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EMPLOYEE STOCK COMPENSATION - Summary of Stock Options Outstanding (Details)	12 Months Ended
	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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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