STOCK COMPENSATION PLANS (Status of nonqualified stock options) (Details) (Stock Options [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
NQSO's outstanding at beginning of year	539,450	728,688	854,717
Granted (in shares)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(134,601)	(118,175)	(44,730)
Forfeited (in shares)	(48,412)	(71,063)	(81,299)
NQSO's outstanding at end of year (in shares)	356,437	539,450	728,688
NQSO's outstanding at beginning of year, weighted average exercise price (in dollars per share)	$ 16.56	$ 15.50	$ 15.40
Granted, weighted average exercise price (in dollars per share)	$ 0	$ 0	$ 0
Exercised, weighted average exercise price (in dollars per share)	$ 12.80	$ 10.26	$ 8.83
Forfeited, weighted average exercise price (in dollars per share)	$ 14.99	$ 16.64	$ 18.18
NQSO's outstanding at end of year, weighted average exercise price (in dollars per share)	$ 17.90	$ 16.56	$ 15.50
Options exercisable at year-end (in shares)	356,437	539,450	728,688
Options exercisable at year-end, weighted average exercise price (in dollars per share)	$ 17.90	$ 16.56	$ 15.50
Intrinsic value of options exercised	$ 660,530	$ 545,695	$ 146,102
Income from options exercised	$ 1,700,000	$ 800,000	$ 500,000