EMPLOYEE COMPENSATION PLANS (OPTIONS ROLLFORWARD TABLE) (DETAILS) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Stock Option Rollforward by Shares
Outstanding as of December 31, 2016, shares | shares		191,666
Exercises, shares | shares		(60,000)
Post-vest cancellations/expirations, shares | shares		(16,666)
Outstanding as of December 31, 2017, shares | shares	115,000	115,000
Vested and exercisable as of December 31, 2017, shares | shares	15,000	15,000
Stock Option Rollforward by Weighted Average Exercise Price
Outstanding as of December 31, 2016, weighted average exercise price | $ / shares		$ 22.83
Exercises, weighted average exercise price | $ / shares		35.81
Post-vest cancellations/expirations, weighted average exercise price | $ / shares		17.31
Outstanding as of December 31, 2017, weighted average exercise price | $ / shares	$ 16.86	16.86
Vested and exercisable as of December 31, 2017, weighted average exercise price | $ / shares	$ 13.87	$ 13.87
Weighted Average Contract Term In Years [Abstract]
Outstanding as of December 31, 2017, weighted average remaining contract term in years	3 years 5 months 16 days
Vested and exercisable as of December 31, 2017, weighted average remaining contract term in years	8 months 16 days
Aggregate Intrinsic Value [Abstract]
Intrinsic Value of Options Exercised | $		$ 194
Vested and exercisable as of December 31, 2017, aggregate intrinsic value | $	$ 396	$ 396