FDIC-Assisted Acquisition (Details Textuals) (USD $)	3 Months Ended		6 Months Ended
FDIC-Assisted Acquisition (Details Textuals) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Impaired Financing Receivable, Unpaid Principal Balance	$ 3,300,000		$ 3,300,000
Basis in acquired loans	1,600,000		1,600,000
Contractually required principal and interest	4,400,000		4,400,000
Expected cash flows	1,800,000		1,800,000
Non-accretable discount	2,700,000		2,700,000
Accretable yield	114,448		114,448
Loan Percentage Of Specified Pool			4.00%
Accretion	396,677		787,233
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	(68,481)
Recoveries	528	963	831	3,852
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	4,060,278			4,622,810
Loan And Lease Losses Principle Prepayments Increased	722,632			22,984
Acquired Loans With Specific Evidence Of Deterioration In Credit Quality (Asc 310-30) [Member]
Accretable yield	0	80,598	0	80,598	36,434	48,637	98,208	114,448
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses	515		515			73,270
Accretion	(36,434)	(16,240)	(48,637)	(32,480)
Acquired Loans Without Specific Evidence Of Deterioration In Credit Quality (Asc310-30 Analogized) [Member]
Accretable yield	12,588,168	9,123,029	12,588,168	9,123,029	8,165,501	8,680,970	9,847,038	10,665,986
Accretion	$ (360,243)	$ (451,489)	$ (738,596)	$ (927,288)
One To Four Family Residential [Member]
Ratio Of Combined Loan To Value			80.00%
Loan Percentage Of Specified Pool			54.00%
One To Four Family Residential [Member] \| Minimum [Member]
Debt Instrument Maturity Period			15 years
One To Four Family Residential [Member] \| Maximum [Member]
Debt Instrument Maturity Period			20 years
Multi - Family and Nonresidential Real Estate [Member]
Loan Percentage Of Specified Pool			40.00%
Commercial and Industrial Loans [Member]
Loan Percentage Of Specified Pool			2.00%
Consumer Loans [Member] \| Minimum [Member]
Debt Instrument Maturity Period			20 years
Consumer Loans [Member] \| Maximum [Member]
Debt Instrument Maturity Period			30 years

Polonia Bancorp 10-Q/A