EARNINGS PER SHARE (Reconciliation of the Denominators of the Basic and Diluted EPS Computations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Basic EPS, Net Income Available to Common Stockholders (Numerator)	$ 20,401	$ 18,216	$ 56,699	$ 49,264
Basic EPS, Weighted Average Shares (Denominator)	43,565,937	45,087,409	43,853,548	45,107,290
Basic EPS, Per Share Amount (in usd per share)	$ 0.47	$ 0.40	$ 1.29	$ 1.09
Effect of dilutive stock awards, Weighted Average Shares (Denominator)	189,000	84,000	114,000	82,000
Diluted EPS, Net Income Available to Common Stockholders (Numerator)	$ 20,401	$ 18,216	$ 56,699	$ 49,264
Diluted EPS, Weighted Average Common Shares	43,754,915	45,171,610	43,967,725	45,189,578
Diluted EPS, Per Share Amount (in usd per share)	$ 0.47	$ 0.40	$ 1.29	$ 1.09