INCOME TAXES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
State	$ 529,603	$ 24,739	$ 511,022
Federal	4,207,980	1,592,276	4,440,767
Current Income Tax Expense (Benefit), Total	4,737,583	1,617,015	4,951,789
Deferred expense	646,899	3,416,135	153,450
Income tax expense	5,384,482	5,033,150	5,105,239
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Tax computed at statutory rate	5,578,285	5,294,107	5,170,418
Tax-exempt interest	(506,280)	(543,638)	(505,644)
Dividend exclusion	(39,237)	(35,439)	(27,805)
State taxes, net of Federal impact	438,582	386,214	299,284
Nondeductible interest expense	16,119	23,242	27,253
Other items, net	(102,987)	(91,336)	141,733
Income tax expense	5,384,482	5,033,150	5,105,239
Deferred tax assets:
Allowance for loan losses	3,989,953	3,688,822
Accrual for employee benefit plans	780,282	829,414
Depreciation	698,373	340,274
Deferred compensation and directors' fees	924,582	894,410
Purchase accounting adjustment - deposits	141,784	314,802
Purchase accounting adjustment - loans	612,696	2,163,551
Purchase accounting adjustment - fixed assets	223,602	223,277
Accounting for defined benefit pension and other benefit plans	6,776,728	5,901,720
Trust preferred impairment write-down	1,340,893	1,338,943
Other	723,419	633,884
Total gross deferred tax assets	16,212,312	16,329,097
Deferred tax liabilities:
Deferred loan fees and costs	908,343	924,500
Prepaid pension	6,102,441	6,694,664
Net unrealized gains on securities available for sale	5,165,238	5,090,655
Other	1,100,783	837,297
Total gross deferred tax liabilities	13,276,805	13,547,116
Net deferred tax asset	2,935,507	2,781,981
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	0	123,530	0
Additions for tax positions of current year		0	123,530
Reductions related to settlement with taxing authorities		(123,530)	0
Unrecognized Tax Benefits, Ending Balance		0	123,530
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Accrued interest or penalties related to uncertain tax position	$ 0	$ 0