11. FAIR VALUE MEASUREMENTS (Detail) - (Table 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Commercial Loan [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	$ 1,326	$ 1,828
Commercial Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	1,326	1,828
Commercial Loan [Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	(64)	(181)
Commercial Real Estate [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	786	7,982
Commercial Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	786	7,982
Commercial Real Estate [Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	73	(489)
Construction Loans [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring		2,083
Construction Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring		2,083
Construction Loans [Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring		(422)
Agriculture [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	389	597
Agriculture [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	389	597
Agriculture [Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	276	(330)
Consumer Other Financing Receivable [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring		565
Consumer Other Financing Receivable [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring		565
Consumer Other Financing Receivable [Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring		(66)
Other Real Estate Owned [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	13,681	8,190
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	13,681	8,190
Other Real Estate Owned [Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	(627)	(1,002)
Total [ Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	16,182	21,245
Total [ Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	16,182	21,245
Total [ Member] | Total Gains(Losses) [Member]
Impaired loans:
Asset Fair Value Disclosure Nonrecurring	(342)	(2,490)
Estimate of Fair Value, Fair Value Disclosure [Member] | Collateralized Mortgage Backed Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	196,430	179,454
Estimate of Fair Value, Fair Value Disclosure [Member] | US Government Corporations and Agencies Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	29,857	29,188
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate Bond Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	1,558
Estimate of Fair Value, Fair Value Disclosure [Member] | Equity Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	61	69
Estimate of Fair Value, Fair Value Disclosure [Member] | Total [ Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	227,906	208,711
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	2	9
Fair Value, Inputs, Level 1 [Member] | Total [ Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	2	9
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	196,430	179,454
Fair Value, Inputs, Level 2 [Member] | US Government Corporations and Agencies Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	29,857	29,188
Fair Value, Inputs, Level 2 [Member] | Corporate Bond Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	1,558
Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	59	60
Fair Value, Inputs, Level 2 [Member] | Total [ Member]
Available-for-sale securities:
Asset Fair Value Disclosure Recurring	$ 227,906	$ 208,702