RETIREMENT PLANS - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Contributions charged	$ 357	$ 311	$ 315
Deferred Compensation Arrangement [Member]
Defined Benefit Plan Disclosure [Line Items]
Age to qualify for payment of retirement benefits	65 years
Estimated present value of future benefits to be paid	125	133
Total annual expense	13	1	12
Supplemental Discretionary Deferred Compensation Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Total annual expense	25	10	30
Account balance of the trust	1,385	1,325
Supplemental Retirement and Salary Continuation Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated present value of future benefits to be paid	4,844	4,527
Total annual expense	575	549	566
Number of defined benefit pension plans	3
Life Insurance Coverage Post-retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated present value of future benefits to be paid	670	566
Total annual expense	$ 104	$ 42	$ 43