EARNINGS PER SHARE DATA (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic [Abstract]
Weighted average shares outstanding (in shares)	14,724	14,395
Net income	$ 11,618	$ 13,232
Convertible preferred stock dividend	23	23
Net income attributable to common shareholders	11,595	13,209
Per share amount (in dollars per share)	$ 0.79	$ 0.92
Diluted [Abstract]
Weighted average shares outstanding (in shares)	14,724	14,395
Assumed conversion of convertible preferred stock (in shares)	840	840
Total dilutive shares (in shares)	15,564	15,235
Net income attributable to common shareholders	11,595	13,209
Convertible preferred stock dividend	23	23
Net income for diluted earnings per share	$ 11,618	$ 13,232
Per share amount (in dollars per share)	$ 0.75	$ 0.87