Note 10 - Regulatory Matters (Detail) - Regulatory Ratios Of The Consolidated Company And Its Subsidiary Banks	Jun. 30, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Entities [Member]
Tier 1 Risk-based Capital	17.25%	16.68%
Total Risk-based Capital	18.52%	17.95%
Tier 1 Leverage	10.44%	9.99%
Farmers Bank [Member]
Tier 1 Risk-based Capital	18.20%	17.58%
Total Risk-based Capital	19.46%	18.84%
Tier 1 Leverage	9.94%	9.47%
First Citizens Bank [Member]
Tier 1 Risk-based Capital	13.51%	13.47%
Total Risk-based Capital	14.47%	14.21%
Tier 1 Leverage	9.38%	8.93%
United Bank [Member]
Tier 1 Risk-based Capital	14.77%	13.51%
Total Risk-based Capital	16.05%	14.79%
Tier 1 Leverage	9.22%	8.44%
Citizens Northern [Member]
Tier 1 Risk-based Capital	12.74%	12.24%
Total Risk-based Capital	13.99%	13.49%
Tier 1 Leverage	8.74%	8.48%	8.04%