EARNINGS PER SHARE ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
EARNINGS PER SHARE ("EPS") [Abstract]
Net income per the Consolidated Statements of Income	$ 13,035	$ 11,501	$ 12,321	$ 14,745	$ 24,536	$ 27,066
Less: Dividends paid and earnings allocated to participating securities	(63)		(43)		(100)	(72)
Income attributable to common stock	$ 12,972		$ 12,278		$ 24,436	$ 26,994
Weighted average common shares outstanding, including participating securities (in shares)	35,891,341		37,569,085		35,951,257	37,533,994
Less: weighted average participating securities (in shares)	(197,249)		(164,867)		(178,538)	(156,938)
Weighted average common shares outstanding (in shares)	35,694,092		37,404,218		35,772,719	37,377,056
Basic EPS (in dollars per share)	$ 0.36		$ 0.33		$ 0.68	$ 0.72
Income attributable to common stock	$ 12,972		$ 12,278		$ 24,436	$ 26,994
Weighted average common shares outstanding (in shares)	35,694,092		37,404,218		35,772,719	37,377,056
Weighted average common equivalent shares outstanding (in shares)	170,297		111,155		171,642	119,926
Weighted average common and equivalent shares outstanding (in shares)	35,864,389		37,515,373		35,944,361	37,496,982
Diluted EPS (in dollars per share)	$ 0.36		$ 0.33		$ 0.68	$ 0.72
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		0	0