Note 17 - Regulatory Matters (Detail) - Regulatory Capital Amounts and Ratios (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Consolidated Entities [Member]
Tier 1 Risk-based Capital1
Actual Amount (in Dollars)	$ 206,470	[1]	$ 192,648	[1]
Actual Ratio	18.27%	[1]	16.68%	[1]
For Capital Adequacy Purposes, Amount (in Dollars)	45,215	[1]	46,194	[1]
For Capital Adequacy Purposes, Ratio	4.00%	[1]	4.00%	[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)		[1]		[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio		[1]		[1]
Total Risk-based Capital 1
Actual Amount (in Dollars)	220,741	[1]	207,254	[1]
Actual Ratio	19.53%	[1]	17.95%	[1]
For Capital Adequacy Purposes, Amount (in Dollars)	90,431	[1]	92,388	[1]
For Capital Adequacy Purposes, Ratio	8.00%	[1]	8.00%	[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)		[1]		[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio		[1]		[1]
Tier 1 Leverage Capital 3
Actual Amount (in Dollars)	206,470	[2]	192,648	[2]
Actual Ratio	11.24%	[2]	10.16%	[2]
For Capital Adequacy Purposes, Amount (in Dollars)	73,479	[2]	75,873	[2]
For Capital Adequacy Purposes, Ratio	4.00%	[2]	4.00%	[2]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)		[2]		[2]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio		[2]		[2]
Farmers Bank [Member]
Tier 1 Risk-based Capital1
Actual Amount (in Dollars)	69,582	[1],[3]	70,101	[1],[3]
Actual Ratio	17.94%	[1],[3]	17.58%	[1],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	15,515	[1],[3]	15,954	[1],[3]
For Capital Adequacy Purposes, Ratio	4.00%	[1],[3]	4.00%	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	23,273	[1],[3]	23,932	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	[1],[3]	6.00%	[1],[3]
Total Risk-based Capital 1
Actual Amount (in Dollars)	74,475	[1],[3]	75,151	[1],[3]
Actual Ratio	19.20%	[1],[3]	18.84%	[1],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	31,030	[1],[3]	31,909	[1],[3]
For Capital Adequacy Purposes, Ratio	8.00%	[1],[3]	8.00%	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	38,788	[1],[3]	39,886	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	[1],[3]	10.00%	[1],[3]
Tier 1 Leverage Capital 3
Actual Amount (in Dollars)	69,582	[2],[3]	70,101	[2],[3]
Actual Ratio	9.68%	[2],[3]	9.47%	[2],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	28,768	[2],[3]	29,611	[2],[3]
For Capital Adequacy Purposes, Ratio	4.00%	[2],[3]	4.00%	[2],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	35,960	[2],[3]	37,013	[2],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	[2],[3]	5.00%	[2],[3]
United Bank [Member]
Tier 1 Risk-based Capital1
Actual Amount (in Dollars)	51,695	[1],[3]	48,744	[1],[3]
Actual Ratio	15.41%	[1],[3]	13.51%	[1],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	13,420	[1],[3]	14,437	[1],[3]
For Capital Adequacy Purposes, Ratio	4.00%	[1],[3]	4.00%	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	20,130	[1],[3]	21,656	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	[1],[3]	6.00%	[1],[3]
Total Risk-based Capital 1
Actual Amount (in Dollars)	55,980	[1],[3]	53,368	[1],[3]
Actual Ratio	16.69%	[1],[3]	14.79%	[1],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	26,839	[1],[3]	28,874	[1],[3]
For Capital Adequacy Purposes, Ratio	8.00%	[1],[3]	8.00%	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	33,549	[1],[3]	36,093	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	[1],[3]	10.00%	[1],[3]
Tier 1 Leverage Capital 3
Actual Amount (in Dollars)	51,695	[2],[3]	48,744	[2],[3]
Actual Ratio	9.45%	[2],[3]	8.44%	[2],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	21,878	[2],[3]	23,105	[2],[3]
For Capital Adequacy Purposes, Ratio	4.00%	[2],[3]	4.00%	[2],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	27,347	[2],[3]	28,881	[2],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	[2],[3]	5.00%	[2],[3]
First Citizens Bank [Member]
Tier 1 Risk-based Capital1
Actual Amount (in Dollars)	29,017	[1]	28,025	[1]
Actual Ratio	13.57%	[1]	13.47%	[1]
For Capital Adequacy Purposes, Amount (in Dollars)	8,552	[1]	8,323	[1]
For Capital Adequacy Purposes, Ratio	4.00%	[1]	4.00%	[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	12,828	[1]	12,485	[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	[1]	6.00%	[1]
Total Risk-based Capital 1
Actual Amount (in Dollars)	30,908	[1]	29,579	[1]
Actual Ratio	14.46%	[1]	14.21%	[1]
For Capital Adequacy Purposes, Amount (in Dollars)	17,104	[1]	16,647	[1]
For Capital Adequacy Purposes, Ratio	8.00%	[1]	8.00%	[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	21,380	[1]	20,809	[1]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	[1]	10.00%	[1]
Tier 1 Leverage Capital 3
Actual Amount (in Dollars)	29,017	[2]	28,025	[2]
Actual Ratio	9.42%	[2]	8.93%	[2]
For Capital Adequacy Purposes, Amount (in Dollars)	12,327	[2]	12,550	[2]
For Capital Adequacy Purposes, Ratio	4.00%	[2]	4.00%	[2]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	15,409	[2]	15,688	[2]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	[2]	5.00%	[2]
Citizens Northern [Member]
Tier 1 Risk-based Capital1
Actual Amount (in Dollars)	23,553	[1],[3]	21,553	[1],[3]
Actual Ratio	12.97%	[1],[3]	12.24%	[1],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	7,264	[1],[3]	7,045	[1],[3]
For Capital Adequacy Purposes, Ratio	4.00%	[1],[3]	4.00%	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	10,896	[1],[3]	10,568	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	[1],[3]	6.00%	[1],[3]
Total Risk-based Capital 1
Actual Amount (in Dollars)	25,826	[1],[3]	23,764	[1],[3]
Actual Ratio	14.22%	[1],[3]	13.49%	[1],[3]
For Capital Adequacy Purposes, Amount (in Dollars)	14,528	[1],[3]	14,091	[1],[3]
For Capital Adequacy Purposes, Ratio	8.00%	[1],[3]	8.00%	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	18,159	[1],[3]	17,614	[1],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	[1],[3]	10.00%	[1],[3]
Tier 1 Leverage Capital 3
Actual Amount (in Dollars)	23,553	[2],[3]	21,553	[2],[3]
Actual Ratio	9.36%	[2],[3]	8.48%	[2],[3]	8.04%
For Capital Adequacy Purposes, Amount (in Dollars)	10,063	[2],[3]	10,168	[2],[3]
For Capital Adequacy Purposes, Ratio	4.00%	[2],[3]	4.00%	[2],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount (in Dollars)	$ 12,579	[2],[3]	$ 12,711	[2],[3]
To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	[2],[3]	5.00%	[2],[3]

[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 by its total quarterly average assets, as defined by regulation.

[3] See discussion below under the caption "Summary of Regulatory Agreements" for minimum capital ratios required as part of the bank's regulatory agreement.