EMPLOYEE BENEFITS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income
Total recognized in other comprehensive income	$ (256,000)	$ 1,524,000	$ 55,000
Amortization from accumulated other comprehensive income into net periodic benefit cost over the next fiscal year
Average rate of return over the past first year period	1 year
Average rate of return over the past second year period	3 years
Average rate of return over the past third year period	5 years
Average rate of return over the past fourth year period	10 years
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost
Investments for long-term growth (as a percent)	97.00%
Investments for near-term benefit payments (as a percent)	3.00%
Cumulative historical returns for the S&P 500 index (as a percent)	9.80%
Cumulative historical returns for the long term U.S. government bonds (as a percent)	5.70%
Target allocations for Plan assets
Percentage of Plan Assets	100.00%	100.00%
Weighted-Average Expected Long-term Rate of Return (as a percent)	7.50%
Cash Equivalents
Target allocations for Plan assets
Target Allocation, minimum (as a percent)	0.00%
Target Allocation, maximum (as a percent)	5.00%
Percentage of Plan Assets	9.40%	21.60%
Equity Securities
Target allocations for Plan assets
Target Allocation, minimum (as a percent)	45.00%
Target Allocation, maximum (as a percent)	65.00%
Percentage of Plan Assets	54.20%	43.10%
Weighted-Average Expected Long-term Rate of Return (as a percent)	4.70%
Fixed income securities
Target allocations for Plan assets
Target Allocation, minimum (as a percent)	35.00%
Target Allocation, maximum (as a percent)	55.00%
Percentage of Plan Assets	36.40%	35.30%
Weighted-Average Expected Long-term Rate of Return (as a percent)	2.80%
Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	11,584,000	8,761,000
Service cost	1,131,000	919,000	769,000
Interest cost	508,000	483,000	434,000
Benefits paid and expected expenses	(366,000)	(234,000)
Assumption changes and other	1,345,000	1,655,000
Plan amendment	(1,095,000)
Benefit obligation at end of year	13,107,000	11,584,000	8,761,000
Change in plan assets, at fair value:
Plan assets at beginning of year	13,403,000	11,023,000
Actual return on plan assets	1,600,000	20,000
Employer contribution	2,500,000	2,727,000
Benefits paid and actual expenses	(378,000)	(367,000)
Plan assets at end of year	17,125,000	13,403,000	11,023,000
Funded status (plan assets less benefit obligations)	4,018,000	1,819,000
Amounts recognized in accumulated other comprehensive income
Net actuarial loss	5,561,000	5,060,000
Prior service cost	71,000	81,000
Plan amendment	(1,094,000)
Net amount recognized	4,538,000	5,141,000
Accumulated benefit obligation	11,600,000	9,400,000
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income
Service cost	1,131,000	919,000	769,000
Interest cost	508,000	483,000	434,000
Expected return on plan assets	(993,000)	(761,000)	(681,000)
Amortization of net loss	248,000	102,000	104,000
Amortization of unrecognized prior service cost	10,000	9,000	9,000
Net periodic benefit cost	904,000	752,000	635,000
Net (gain) loss	(345,000)	2,529,000	254,000
Amortization of net gain	(248,000)	(102,000)	(104,000)
Amortization of prior service cost	(10,000)	(9,000)	(9,000)
Total recognized in other comprehensive income, before tax	(603,000)	2,418,000	141,000
Deferred taxes	240,000	(960,000)	(56,000)
Total recognized in other comprehensive income	(363,000)	1,458,000	85,000
Total recognized in net periodic benefit cost and other comprehensive income	541,000	2,210,000	720,000
Amortization from accumulated other comprehensive income into net periodic benefit cost over the next fiscal year
Estimated net loss	288,000
Estimated transition obligation	0
Estimated prior service costs	77,000
Weighted Average Assumptions Used to Determine Benefit Obligations
Discount rate (as a percent)	4.20%	4.53%	5.58%
Rate of compensation increase (as a percent)	3.00%	3.00%	3.50%
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate (as a percent)	4.53%	5.58%	5.89%
Rate of compensation increase (as a percent)	3.00%	3.50%	4.00%
Expected long-term rate of return (as a percent)	7.50%	7.00%	7.50%
SERP Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	1,731,000	1,542,000
Service cost	120,000	109,000	96,000
Interest cost	52,000	57,000	62,000
Benefits paid and expected expenses	(112,000)	(112,000)
Assumption changes and other	208,000	135,000
Benefit obligation at end of year	1,999,000	1,731,000	1,542,000
Change in plan assets, at fair value:
Employer contribution	112,000	112,000
Benefits paid and actual expenses	(112,000)	(112,000)
Funded status (plan assets less benefit obligations)	(1,999,000)	(1,731,000)
Amounts recognized in accumulated other comprehensive income
Net actuarial loss	406,000	200,000
Transition obligation	142,000	170,000
Net amount recognized	548,000	370,000
Accumulated benefit obligation	1,600,000	1,500,000
Components of net periodic benefit cost and other amounts recognized in Other Comprehensive Income
Service cost	120,000	109,000	96,000
Interest cost	52,000	57,000	62,000
Amortization of unrecognized transition (asset) obligation	30,000	28,000	28,000
Net periodic benefit cost	202,000	194,000	186,000
Net (gain) loss	208,000	136,000	(22,000)
Amortization of transition obligation	(30,000)	(28,000)	(28,000)
Total recognized in other comprehensive income, before tax	178,000	108,000	(50,000)
Deferred taxes	(71,000)	(43,000)	20,000
Total recognized in other comprehensive income	107,000	65,000	(30,000)
Total recognized in net periodic benefit cost and other comprehensive income	309,000	259,000	156,000
Amortization from accumulated other comprehensive income into net periodic benefit cost over the next fiscal year
Estimated net loss	15,000
Estimated transition obligation	$ 28,000
Weighted Average Assumptions Used to Determine Benefit Obligations
Discount rate (as a percent)	3.90%	3.13%	3.87%
Rate of compensation increase (as a percent)	5.00%	5.00%	5.00%
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate (as a percent)	3.13%	3.87%	4.31%
Rate of compensation increase (as a percent)	5.00%	5.00%	5.00%