EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
EARNINGS PER SHARE ("EPS") [Abstract]
Net income per the Consolidated Statements of Income	$ 11,157	$ 50,037
Less: Dividends paid and earnings allocated to participating securities	(25)	(31)
Income attributable to common stock	$ 11,132	$ 50,006
Weighted average common shares outstanding, including participating securities (in shares)	37,603,628	36,813,347
Less: weighted average participating securities (in shares)	(150,423)	(223,605)
Weighted average common shares outstanding (in shares)	37,453,205	36,589,742
Basic EPS (in dollars per share)	$ 0.30	$ 1.37
Income attributable to common stock	$ 11,132	$ 50,006
Weighted average common shares outstanding (in shares)	37,453,205	36,589,742
Weighted average common equivalent shares outstanding (in shares)	96,371	73,209
Weighted average common and equivalent shares outstanding (in shares)	37,549,576	36,662,951
Diluted EPS (in dollars per share)	$ 0.30	$ 1.36
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)	0	124,622