Note 14 - Regulatory (Details) - Summary of the Bank's compliance: (Flushing Bank [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Flushing Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital level (in Dollars)	$ 438,423
Capital level	9.48%
Well capitalized (in Dollars)	231,234
Well capitalized	5.00%
Excess (in Dollars)	207,189
Excess	4.48%
Capital level (in Dollars)	438,423
Capital level	14.22%
Well capitalized (in Dollars)	185,022
Well capitalized	6.00%
Excess (in Dollars)	253,401
Excess	8.22%
Capital level (in Dollars)	469,239
Capital level	15.22%
Well capitalized (in Dollars)	308,370
Well capitalized	10.00%
Excess (in Dollars)	$ 160,869
Excess	5.22%