EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
EARNINGS PER SHARE ("EPS") [Abstract]
Net income per the Consolidated Statements of Income	$ 11,501	$ 14,745
Less: Dividends paid and earnings allocated to participating securities	(37)	(29)
Income attributable to common stock	$ 11,464	$ 14,716
Weighted average common shares outstanding, including participating securities (in shares)	36,000,140	37,495,317
Less: weighted average participating securities (in shares)	(153,793)	(145,725)
Weighted average common shares outstanding (in shares)	35,846,347	37,349,592
Basic EPS (in dollars per share)	$ 0.32	$ 0.39
Income attributable to common stock	$ 11,464	$ 14,716
Weighted average common shares outstanding (in shares)	35,846,347	37,349,592
Weighted average common equivalent shares outstanding (in shares)	130,568	115,133
Weighted average common and equivalent shares outstanding (in shares)	35,976,915	37,464,725
Diluted EPS (in dollars per share)	$ 0.32	$ 0.39
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Weighted average shares excluded from earnings per share calculation (in shares)	0	0