EARNINGS PER SHARE (EPS) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
EARNINGS PER SHARE (EPS) [Abstract]
Net income	$ 10,034	$ 10,570
Less: Dividends paid on earnings allocated to participating securities	(45)	(46)
Income attributable to common stock	9,989	10,524
Weighted Average Number Of Shares Outstanding Including Participating Securities Basic (in shares)	36,094,495	35,147,851
Less: weighted average participating securities (in shares)	(317,810)	(324,880)
Weighted average shares outstanding utilized in the calculation of basic EPS (in shares)	35,776,685	34,822,971
Earnings Per Share, Basic (in dollars per share)	$ 0.28	$ 0.30
Income attributable to common stock	$ 9,989	$ 10,524
Weighted average common shares outstanding	35,776,685	34,822,971
Common stock equivalents resulting from the dilutive effect of "in-the-money" stock options	112,899	56,268
Weighted average shares outstanding utilized in the calculation of diluted EPS (in shares)	35,889,584	34,879,239
Earnings Per Share, Diluted (in dollars per share)	$ 0.28	$ 0.30
Weighted average shares excluded from earnings per share calculation (in shares)	364,715	1,300,035