SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentages of vesting for one year	100.00%
Percentages of vesting for three years	33.30%
Percentages of vesting for five years	20.00%
Percentages of vesting for ten years	10.00%
Award vesting period	1 year
Number of shares available for future grants (in shares)	401,223
Restricted Stock [Roll Forward]
Non-vested, beginning balance (in shares)	143,380	137,507	179,942
Granted (in shares)	18,672	108,553	35,821
Forfeited (in shares)	(298)	(39,000)	(20,855)
Vested (in shares)	(83,853)	(63,680)	(57,401)
Nonvested, ending balance (in shares)	77,901	143,380	137,507
Weighted Average Grant Price [Roll Forward]
Non vested, beginning balance (in dollars per share)	$ 26.76	$ 54.58	$ 52.71
Granted (in dollars per share)	34.07	17.07	40.95
Forfeited (in dollars per share)	59.60	65.41	41.34
Vested (in dollars per share)	24.92	46.65	44.99
Nonvested, ending balance (in dollars per share)	$ 30.36	$ 26.76	$ 54.58
Stock compensation expense	$ 1.7	$ 2.0	$ 3.0
Related income tax benefit recognized	0.7	0.8	1.2
2016 Omnibus Incentive Plan [Member]
Weighted Average Grant Price [Roll Forward]
Unrecognized compensation expense	$ 1.6	$ 2.7	$ 4.9
Compensation cost not yet recognized, period for recognition	15 months 6 days