Note 5 - Loans (Details) - Impaired loans: (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
With no related allowance recorded:
Recorded Investment	$ 70,459	$ 108,883
Unpaid Principal Balance	83,817	128,600
Average Recorded Investment	85,023	134,768
Interest Income Recognized	1,002	1,889
With an allowance recorded:
Recorded Investment	20,062	19,727
Unpaid Principal Balance	20,128	19,808
Related Allowance	1,426	1,494
Average Recorded Investment	21,202	20,926
Interest Income Recognized	676	1,004
Total Impaired Loans:
Recorded Investment	120,166	171,001
Related Allowance	1,426	1,494
Mortgage Loans [Member] | Multi-Family Residential [Member]
With no related allowance recorded:
Recorded Investment	23,043	19,753
Unpaid Principal Balance	26,245	22,889
Average Recorded Investment	23,219	27,720
Interest Income Recognized	208	429
With an allowance recorded:
Recorded Investment	3,025	1,922
Unpaid Principal Balance	3,026	1,937
Related Allowance	265	183
Average Recorded Investment	2,839	3,174
Interest Income Recognized	109	124
Total Impaired Loans:
Related Allowance	265	183
Mortgage Loans [Member] | Commercial Real Estate Loans [Member]
With no related allowance recorded:
Recorded Investment	16,836	34,672
Unpaid Principal Balance	17,786	38,594
Average Recorded Investment	20,887	43,976
Interest Income Recognized	205	536
With an allowance recorded:
Recorded Investment	7,902	7,773
Unpaid Principal Balance	7,968	7,839
Related Allowance	270	359
Average Recorded Investment	7,506	6,530
Interest Income Recognized	232	400
Total Impaired Loans:
Related Allowance	270	359
Mortgage Loans [Member] | One-To-Four Family - Mixed-Use Property [Member]
With no related allowance recorded:
Recorded Investment	13,210	23,054
Unpaid Principal Balance	15,685	25,825
Average Recorded Investment	14,305	27,018
Interest Income Recognized	149	485
With an allowance recorded:
Recorded Investment	3,770	3,314
Unpaid Principal Balance	3,769	3,313
Related Allowance	649	571
Average Recorded Investment	3,991	4,385
Interest Income Recognized	165	205
Total Impaired Loans:
Related Allowance	649	571
Mortgage Loans [Member] | One-To-Four Family - Residential [Member]
With no related allowance recorded:
Recorded Investment	14,753	15,328
Unpaid Principal Balance	18,840	18,995
Average Recorded Investment	14,697	15,047
Interest Income Recognized	330	186
With an allowance recorded:
Recorded Investment	367	374
Unpaid Principal Balance	367	374
Related Allowance	59	94
Average Recorded Investment	369	188
Interest Income Recognized	11	19
Total Impaired Loans:
Related Allowance	59	94
Mortgage Loans [Member] | Co-Operative Apartments [Member]
With no related allowance recorded:
Recorded Investment	164	237
Unpaid Principal Balance	282	299
Average Recorded Investment	232	174
Interest Income Recognized		2
With an allowance recorded:
Average Recorded Investment		101
Mortgage Loans [Member] | Construction [Member]
With no related allowance recorded:
Recorded Investment	425	10,598
Unpaid Principal Balance	651	15,182
Average Recorded Investment	5,351	14,689
Interest Income Recognized		173
With an allowance recorded:
Recorded Investment	1,916	3,805
Unpaid Principal Balance	1,916	3,805
Related Allowance	17	38
Average Recorded Investment	2,323	4,275
Interest Income Recognized	48	140
Total Impaired Loans:
Related Allowance	17	38
Mortgage Loans [Member]
With an allowance recorded:
Related Allowance	1,260	1,245
Total Impaired Loans:
Recorded Investment	85,411	120,830
Unpaid Principal Balance	96,535	139,052
Related Allowance	1,260	1,245
Average Recorded Investment	95,719	147,277
Interest Income Recognized	1,457	2,699
Non-Mortgage Loans [Member] | Small Business Administration [Member]
With no related allowance recorded:
Recorded Investment		850
Unpaid Principal Balance		1,075
Average Recorded Investment	329	1,042
Interest Income Recognized		25
Non-Mortgage Loans [Member] | Commercial Business And Other [Member]
With no related allowance recorded:
Recorded Investment	2,028	4,391
Unpaid Principal Balance	4,328	5,741
Average Recorded Investment	6,003	5,102
Interest Income Recognized	110	53
With an allowance recorded:
Recorded Investment	3,082	2,539
Unpaid Principal Balance	3,082	2,540
Related Allowance	166	249
Average Recorded Investment	4,174	2,273
Interest Income Recognized	111	116
Total Impaired Loans:
Related Allowance	166	249
Non-Mortgage Loans [Member]
With an allowance recorded:
Related Allowance	166	249
Total Impaired Loans:
Recorded Investment	5,110	7,780
Unpaid Principal Balance	7,410	9,356
Related Allowance	166	249
Average Recorded Investment	10,506	8,417
Interest Income Recognized	221	194
Multi-Family Residential [Member]
Total Impaired Loans:
Recorded Investment	34,097	35,672
Commercial Real Estate Loans [Member]
Total Impaired Loans:
Recorded Investment	34,185	38,974
One-To-Four Family - Mixed-Use Property [Member]
Total Impaired Loans:
Recorded Investment	24,587	37,739
One-To-Four Family - Residential [Member]
Total Impaired Loans:
Recorded Investment	16,467	20,551
Co-Operative Apartments [Member]
Total Impaired Loans:
Recorded Investment	164	340
Construction [Member]
Total Impaired Loans:
Recorded Investment	2,341	14,403
Small Business Administration [Member]
Total Impaired Loans:
Recorded Investment	336	779
Commercial Business And Other [Member]
Total Impaired Loans:
Recorded Investment	$ 7,989	$ 22,543