EARNINGS PER SHARE (Reconcilement of the Denominators of the Basic and Diluted EPS Computations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconcilement of the denominators of the basic and diluted EPS computations
Net income, basic	$ 7,946	$ 9,626	$ 26,392	$ 25,969
Weighted Average Common Shares, Basic	24,895	25,881	24,987	25,893
Basic, Per Share Amount	$ 0.32	$ 0.37	$ 1.06	$ 1.00
Add: potentially dilutive common shares - stock awards, Weighted Average Common Shares	68	27	44	28
Diluted, Net Income Available to Common Shareholders	$ 7,946	$ 9,626	$ 26,392	$ 25,969
Diluted, Weighted Average Common Shares	24,963	25,908	25,031	25,921
Diluted, Per Share Amount	$ 0.32	$ 0.37	$ 1.06	$ 1.00