STOCK COMPENSATION PLANS (Status of nonqualified stock options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Intrinsic value of options exercised	$ 545,695	$ 146,102	$ 21,120
Income from options exercised	$ 830,771	$ 447,983	$ 64,386
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
NQSO's outstanding at beginning of year	728,688	854,717	1,278,557
Granted (in shares)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(118,175)	(44,730)	(8,000)
Forfeited (in shares)	(71,063)	(81,299)	(415,840)
NQSO's outstanding at end of year (in shares)	539,450	728,688	854,717
NQSO's outstanding at beginning of year, weighted average exercise price (in dollars per share)	$ 15.50	$ 15.40	$ 15.65
Granted, weighted average exercise price (in dollars per share)	$ 0.00	$ 0.00	$ 0
Exercised, weighted average exercise price (in dollars per share)	$ 10.26	$ 8.83	$ 7.35
Forfeited, weighted average exercise price (in dollars per share)	$ 16.64	$ 18.18	$ 16.31
NQSO's outstanding at end of year, weighted average exercise price (in dollars per share)	$ 16.56	$ 15.50	$ 15.40
Options exercisable at year-end (in shares)	539,450	728,688	717,705
Options exercisable at year-end, weighted average exercise price (in dollars per share)	$ 16.56	$ 15.50	$ 14.84