Note 5 - Loans (Details) - Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
With no related allowance recorded:
Recorded Investment	$ 67,050	$ 65,488
Unpaid Principal Balance	76,913	76,911
Average Recorded Investment	66,271	80,141
Interest Income Recognized	293	1,380
With an allowance recorded:
Recorded Investment	14,878	16,280
Unpaid Principal Balance	14,944	16,376
Related Allowance	1,415	1,648
Average Recorded Investment	15,580	19,972
Interest Income Recognized	171	864
Total Impaired Loans:
Recorded Investment	133,606	116,045
Related Allowance	1,415	1,648
Multi-Family Residential [Member] | Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment	18,087	18,709
Unpaid Principal Balance	20,620	20,931
Average Recorded Investment	18,398	22,091
Interest Income Recognized	59	402
With an allowance recorded:
Recorded Investment	2,811	3,048
Unpaid Principal Balance	2,811	3,049
Related Allowance	304	312
Average Recorded Investment	2,930	2,892
Interest Income Recognized	38	170
Total Impaired Loans:
Related Allowance	304	312
Multi-Family Residential [Member]
Total Impaired Loans:
Recorded Investment	28,377	29,029
Commercial Real Estate Loans [Member] | Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment	16,536	16,721
Unpaid Principal Balance	16,828	17,405
Average Recorded Investment	16,629	19,846
Interest Income Recognized	115	266
With an allowance recorded:
Recorded Investment	3,022	3,036
Unpaid Principal Balance	3,088	3,102
Related Allowance	210	164
Average Recorded Investment	3,029	6,388
Interest Income Recognized	48	194
Total Impaired Loans:
Related Allowance	210	164
Commercial Real Estate Loans [Member]
Total Impaired Loans:
Recorded Investment	51,380	30,323
One-To-Four Family - Mixed-Use Property [Member] | Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment	12,914	12,748
Unpaid Principal Balance	15,307	15,256
Average Recorded Investment	12,831	13,916
Interest Income Recognized	57	319
With an allowance recorded:
Recorded Investment	3,146	4,191
Unpaid Principal Balance	3,146	4,221
Related Allowance	617	875
Average Recorded Investment	3,669	4,041
Interest Income Recognized	43	228
Total Impaired Loans:
Related Allowance	617	875
One-To-Four Family - Mixed-Use Property [Member]
Total Impaired Loans:
Recorded Investment	20,786	22,890
One-To-Four Family - Residential [Member] | Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment	13,579	14,026
Unpaid Principal Balance	16,636	17,527
Average Recorded Investment	13,803	14,529
Interest Income Recognized	19	125
With an allowance recorded:
Recorded Investment	362	364
Unpaid Principal Balance	362	364
Related Allowance	57	58
Average Recorded Investment	363	368
Interest Income Recognized	4	15
Total Impaired Loans:
Related Allowance	57	58
One-To-Four Family - Residential [Member]
Total Impaired Loans:
Recorded Investment	16,003	16,874
Co-Operative Apartments [Member] | Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment		59
Unpaid Principal Balance		147
Average Recorded Investment	30	189
Co-Operative Apartments [Member]
Total Impaired Loans:
Recorded Investment		59
Construction [Member] | Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment	570
Unpaid Principal Balance	570	118
Average Recorded Investment	285	4,014
With an allowance recorded:
Recorded Investment	746	746
Unpaid Principal Balance	746	746
Related Allowance	9	17
Average Recorded Investment	746	1,929
Interest Income Recognized		18
Total Impaired Loans:
Related Allowance	9	17
Construction [Member]
Total Impaired Loans:
Recorded Investment	1,316	746
Small Business Administration [Member] | Non-Mortgage Loans [Member]
With no related allowance recorded:
Average Recorded Investment		247
Small Business Administration [Member]
Total Impaired Loans:
Recorded Investment	302	310
Commercial Business And Other [Member] | Non-Mortgage Loans [Member]
With no related allowance recorded:
Recorded Investment	5,364	3,225
Unpaid Principal Balance	6,952	5,527
Average Recorded Investment	4,295	5,309
Interest Income Recognized	43	268
With an allowance recorded:
Recorded Investment	4,791	4,895
Unpaid Principal Balance	4,791	4,894
Related Allowance	218	222
Average Recorded Investment	4,843	4,354
Interest Income Recognized	38	239
Total Impaired Loans:
Related Allowance	218	222
Commercial Business And Other [Member]
Total Impaired Loans:
Recorded Investment	15,442	15,814
Mortgage Loans [Member]
With an allowance recorded:
Related Allowance	1,197	1,426
Total Impaired Loans:
Recorded Investment	71,773	73,648
Unpaid Principal Balance	80,114	82,866
Related Allowance	1,197	1,426
Average Recorded Investment	72,713	90,203
Interest Income Recognized	383	1,737
Non-Mortgage Loans [Member]
With an allowance recorded:
Related Allowance	218	222
Total Impaired Loans:
Recorded Investment	10,155	8,120
Unpaid Principal Balance	11,743	10,421
Related Allowance	218	222
Average Recorded Investment	9,138	9,910
Interest Income Recognized	$ 81	$ 507