EARNINGS PER SHARE DATA (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic [Abstract]
Weighted average shares outstanding (in shares)	14,368	14,708	14,380	14,716
Net income	$ 7,167	$ 14,884	$ 16,818	$ 25,847
Convertible preferred stock dividend	22	22	45	45
Net income attributable to common shareholders	$ 7,145	$ 14,862	$ 16,773	$ 25,802
Per share amount (in dollars per share)	$ 0.50	$ 1.01	$ 1.17	$ 1.75
Diluted [Abstract]
Weighted average shares outstanding (in shares)	14,368	14,708	14,380	14,716
Assumed conversion of convertible preferred stock (in shares)	840	840	840	840
Total dilutive shares (in shares)	15,208	15,548	15,220	15,556
Net income attributable to common shareholders	$ 7,145	$ 14,862	$ 16,773	$ 25,802
Convertible preferred stock dividend	22	22	45	45
Net income for diluted earnings per share	$ 7,167	$ 14,884	$ 16,818	$ 25,847
Per share amount (in dollars per share)	$ 0.47	$ 0.96	$ 1.11	$ 1.66