EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
EARNINGS PER SHARE ("EPS") [Abstract]
Net income per the Consolidated Statements of Income	$ 11,989	$ 11,208	$ 23,146	$ 61,245
Less: Dividends paid and earnings allocated to participating securities	(38)	(24)	(63)	(55)
Income attributable to common stock	$ 11,951	$ 11,184	$ 23,083	$ 61,190
Weighted average common shares outstanding, including participating securities (in shares)	37,733,956	36,946,082	37,670,585	36,874,535
Less: weighted average participating securities (in shares)	(179,346)	(192,525)	(166,398)	(202,885)
Weighted average common shares outstanding (in shares)	37,554,610	36,753,557	37,504,187	36,671,650
Basic EPS (in dollars per share)	$ 0.32	$ 0.30	$ 0.62	$ 1.67
Income attributable to common stock	$ 11,951	$ 11,184	$ 23,083	$ 61,190
Weighted average common shares outstanding (in shares)	37,554,610	36,753,557	37,504,187	36,671,650
Weighted average common equivalent shares outstanding (in shares)	81,188	65,028	86,011	69,420
Weighted average common and equivalent shares outstanding (in shares)	37,635,798	36,818,585	37,590,198	36,741,070
Diluted EPS (in dollars per share)	$ 0.32	$ 0.30	$ 0.61	$ 1.67
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	80,000	0	80,000