EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
EARNINGS PER SHARE ("EPS") [Abstract]
Net income per the Consolidated Statements of Income	$ 10,537	$ 10,081	$ 71,782	$ 33,388
Less: Dividends paid and earnings allocated to participating securities	(26)	(31)	(85)	(105)
Income attributable to Common stock	$ 10,511	$ 10,050	$ 71,697	$ 33,283
Weighted average common shares outstanding, including participating securities (in shares)	36,910,594	36,552,925	36,904,324	36,414,645
Less: weighted average participating securities (in shares)	(168,767)	(224,102)	(209,152)	(252,162)
Weighted average common shares outstanding (in shares)	36,741,827	36,328,823	36,695,172	36,162,483
Basic EPS (in dollars per share)	$ 0.29	$ 0.28	$ 1.95	$ 0.92
Income attributable to Common stock	$ 10,511	$ 10,050	$ 71,697	$ 33,283
Weighted average common shares outstanding (in shares)	36,741,827	36,328,823	36,695,172	36,162,483
Weighted average common equivalent shares outstanding (in shares)	46,480	92,631	61,446	87,887
Weighted average common and equivalent shares outstanding (in shares)	36,788,307	36,421,454	36,756,618	36,250,370
Diluted EPS (in dollars per share)	$ 0.29	$ 0.28	$ 1.95	$ 0.92
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares excluded from earnings per share calculation (in shares)	79,783	80,000	79,927	132,976