STOCK-BASED COMPENSATION PLANS (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at beginning of year	1,260,866	1,265,792
Shares, Outstanding at end of year	1,355,416	1,260,866	1,265,792
Shares, Exercisable at end of year	603,834	581,081	706,863
Weighted Average Exercise Price, Outstanding at beginning of year	$ 24.41	$ 22.76
Weighted Average Exercise Price, Outstanding at end of year	$ 25.36	$ 24.41	$ 22.76
Weighted Average Exercise Price, Exercisable at end of year	$ 23.66	$ 22.39	$ 21.89
Weighted average fair market value of options granted	$ 2.93	$ 2.77	$ 3.68
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at beginning of year	1,260,866	1,265,792	1,307,488
Shares, Granted	331,600	333,300	253,400
Shares, Exercised	(218,150)	(219,526)	(174,646)
Shares, Forfeited or expired	(18,900)	(118,700)	(120,450)
Shares, Outstanding at end of year		1,260,866	1,265,792
Weighted Average Exercise Price, Outstanding at beginning of year	$ 24.41	$ 22.76	$ 21.76
Weighted Average Exercise Price, Granted	$ 27.04	$ 28.50	$ 23.53
Weighted Average Exercise Price, Exercised	$ 22.37	$ 17.91	$ 13.17
Weighted Average Exercise Price, Forfeited or expired	$ 25.71	$ 30.30	$ 27.37
Weighted Average Exercise Price, Outstanding at end of year		$ 24.41	$ 22.76
Weighted Average Remaining Contractual Life (in Years) , Outstanding - December 31, 2014	3 years 9 months 18 days
Weighted Average Remaining Contractual Life (in Years) , Exercisable - December 31, 2014	2 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding - December 31, 2014	$ 5,839,000
Aggregate Intrinsic Value, Exercisable - December 31, 2014	$ 3,631,000