STOCKHOLDERS' EQUITY (Summary of Changes in Restricted Shares) (Details) - Restricted Stock [Member] - $ / shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Class of Stock [Line Items]
Shares, Nonvested shares at beginning of period	195,502	120,001	185,002	120,001	120,001
Shares, Granted	57,333	111,414	75,333	111,414
Shares, Vested	(80,336)	(28,913)	(87,836)	(28,913)
Shares, Forfeited
Shares, Nonvested shares at end of period	172,499	202,502	172,499	202,502	185,002
Weighted average grant date fair value, Nonvested at beginning of period	$ 21.32	$ 20.10	$ 21.58	$ 20.10	$ 20.10
Weighted average grant date fair value, Granted	19.52	22.59	19.18	22.59
Weighted average grant date fair value, Vested	18.46	21.26	18.53	21.26
Weighted average grant date fair value, Forfeited
Weighted average grant date fair value, Nonvested at end of period	$ 18.37	$ 21.33	$ 18.37	$ 21.33	$ 21.58