Fair Value (Details 2) (Fair Value, Measurements, Nonrecurring [Member], USD $)	9 Months Ended
	Sep. 30, 2012
Sales comparison approach [Member] \| Agricultural real estate [Member] \| Impaired Loans [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	$ 277,849
Fair Value Measurements, Valuation Techniques	Sales comparison approach
Adjustment for differences between comparable sales	29.50%
Sales comparison approach [Member] \| Agricultural real estate [Member] \| Other Real Estate Owned [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	48,880
Fair Value Measurements, Valuation Techniques	Sales comparison approach
Adjustment for differences between comparable sales	6.00%
Sales comparison approach [Member] \| Residential Real Estate [Member] \| Impaired Loans [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	1,762,936
Fair Value Measurements, Valuation Techniques	Sales comparison approach
Adjustment for differences between comparable sales	29.50%
Sales comparison approach [Member] \| Residential Real Estate [Member] \| Other Real Estate Owned [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	576,690
Fair Value Measurements, Valuation Techniques	Sales comparison approach
Adjustment for differences between comparable sales	6.00%
Sales comparison approach [Member] \| Construction and land development [Member] \| Impaired Loans [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	644,744
Fair Value Measurements, Valuation Techniques	Sales comparison approach
Adjustment for differences between comparable sales	29.50%
Sales comparison approach [Member] \| Construction and land development [Member] \| Other Real Estate Owned [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	3,536,670
Fair Value Measurements, Valuation Techniques	Sales comparison approach
Adjustment for differences between comparable sales	6.00%
Cost approach [Member] \| Commercial real estate [Member] \| Impaired Loans [Member]
Qualitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis
Fair value	$ 3,367,844
Fair Value Measurements, Valuation Techniques	Cost approach
Adjustment for differences between comparable sales	29.50%

FIRST PULASKI NATIONAL CORP 10-Q