12. FAIR VALUES - Summary of Assets And Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 3 [Member]
Other real estate owned	$ 13,196	$ 12,398
Impaired Loans	29,048	28,739
Fair Value, Inputs, Level 2 [Member]
Impaired Loans	84,710	101,642
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government Agencies
Available for sale investments	35,125	41,523
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Taxable Municipals
Available for sale investments	2,432	3,281
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Bonds
Available for sale investments	2,016	1,939
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities
Available for sale investments	$ 45,137	54,899
Other Loans | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member]
Impaired Loans
Consumer Installment Loans | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member]
Impaired Loans	$ 51	54
Agriculture | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member]
Impaired Loans	137	36
Commercial Real Estate [Member] | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member]
Impaired Loans		45
Commercial Real Estate [Member] | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]
Impaired Loans	5,628	6,427
Farmland | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]
Impaired Loans	4,522	4,416
Multifamily | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]
Impaired Loans	300	430
Construction and Land Development | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]
Impaired Loans	465	144
Residential 1-4 Family | Nonrecurring Basis | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]
Impaired Loans	$ 4,704	$ 4,789