Note 10 - Regulatory Matters (Details) - Regulatory Ratios of the Consolidated Company and its Subsidiary Banks	Jun. 30, 2014		Dec. 31, 2013
Consolidated [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Risk-based Capital	19.43%	[1]	18.95%	[1]
Total Risk-based Capital	20.69%	[1]	20.21%	[1]
Tier 1 Leverage	11.99%	[2]	11.90%	[2]
Farmers Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Risk-based Capital	18.08%	[1]	17.56%	[1]
Total Risk-based Capital	19.33%	[1]	18.82%	[1]
Tier 1 Leverage	9.71%	[2]	9.60%	[2]
United Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Risk-based Capital	16.16%	[1]	15.06%	[1]
Total Risk-based Capital	17.43%	[1]	16.33%	[1]
Tier 1 Leverage	10.31%	[2]	9.67%	[2]
First Citizens Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Risk-based Capital	13.39%	[1]	12.92%	[1]
Total Risk-based Capital	14.07%	[1]	13.67%	[1]
Tier 1 Leverage	9.20%	[2]	9.03%	[2]
Citizens Northern [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 Risk-based Capital	14.12%	[1]	13.57%	[1]
Total Risk-based Capital	15.37%	[1]	14.82%	[1]
Tier 1 Leverage	9.81%	[2]	9.67%	[2]

[1] Tier 1 Risk-based and Total Risk-based Capital ratios are computed by dividing a bank's Tier 1 or Total Capital, as defined by regulation, by a risk-weighted sum of the bank's assets, with the risk weighting determined by general standards established by regulation. The safest assets (e.g., government obligations) are assigned a weighting of 0% with riskier assets receiving higher ratings (e.g., ordinary commercial loans are assigned a weighting of 100%).

[2] Tier 1 Leverage ratio is computed by dividing a bank's Tier 1 Capital, as defined by regulation, by its total quarterly average assets.