STOCK BASED COMPENSATION - Activity in Stock Options (Details) - Stock options $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Shares
Outstanding, beginning of year (in shares) | shares	310,665
Exercised (in shares) | shares	(111,595)
Forfeited or expired (in shares) | shares	(5,956)
Outstanding at end of period (in shares) | shares	193,114
Exercisable end of period (in shares) | shares	181,710
Fully vested and expected to vest(in shares) | shares	192,542
Weighted Average Exercise Price
Outstanding, beginning of year (in dollars per share) | $ / shares	$ 12.83
Exercised (in dollars per share) | $ / shares	13.94
Forfeited or expired (in dollars per share) | $ / shares	16.07
Outstanding, period end (in dollars per share) | $ / shares	12.09
Exercisable at end of period (in dollars per share) | $ / shares	11.83
Fully vested and expected to vest (in dollars per share) | $ / shares	$ 12.07
Stock options vested and currently exercisable
Outstanding at end of period, Weighted average remaining contractual term (years)	4 years
Outstanding at end of period, Aggregate intrinsic value | $	$ 4,309
Exercisable at end of period, Weighted average remaining contractual term (years)	3 years 9 months 18 days
Exercisable at end of period, Aggregate intrinsic value | $	$ 4,101
Fully vested and expected to vest, Weighted average remaining contractual term (years)	4 years
Fully vested and expected to vest, Aggregate intrinsic value | $	$ 4,299