RETIREMENT PLANS (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Contribution Plan Disclosure [Line Items]
Contribution, percentage	7.50%
Pension Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Covered compensation limit of the defined contribution pension plan	$ 260,000	$ 255,000	$ 250,000
Expenses recognized for defined contribution plans	470,000	422,000	393,000
Contribution, percentage	5.00%
Pension Plan [Member] | Employees Above Social Security Wage Base [Member]
Defined Contribution Plan Disclosure [Line Items]
Contribution, percentage	5.00%
401(k) Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Expenses recognized for defined contribution plans	219,000	186,000	179,000
Contribution, percentage	5.00%
Matching contribution, percentage of match	50.00%
Effective contribution rate	2.50%
401(k) Plan [Member] | Participants Under Age 50 [Member]
Defined Contribution Plan Disclosure [Line Items]
Maximum contribution to plans	17,500	17,500	17,000
401(k) Plan [Member] | Participants Over Age 50 [Member]
Defined Contribution Plan Disclosure [Line Items]
Maximum contribution to plans	$ 23,000	$ 23,000	$ 22,500