Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Detail) - Terms of the securities issued by the trusts: (Capital Securities [Member])	12 Months Ended
	Dec. 31, 2012
Flushing Financial Capital Trust II [Member]
Initial Rate	7.14%
Issue Date	Jun. 20, 2007
First Reset Date	Sep. 01, 2012
Spread over 3-month LIBOR	1.41%
Maturity Date	Sep. 01, 2037
Flushing Financial Capital Trust III [Member]
Initial Rate	6.89%
Issue Date	Jun. 21, 2007
First Reset Date	Jun. 15, 2012
Spread over 3-month LIBOR	1.44%
Maturity Date	Sep. 15, 2037
Flushing Financial Capital Trust IV [Member]
Initial Rate	6.85%
Issue Date	Jul. 03, 2007
First Reset Date	Jul. 30, 2012
Spread over 3-month LIBOR	1.42%
Maturity Date	Jul. 30, 2037