Note 5 - Loans (Details) - Age Analysis of Recorded Investment in Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	$ 33,866	$ 37,367
60 - 89 Days Past Due	5,739	4,696
Greater than 90 Days	42,005	46,632
Total Past Due	81,610	88,695
Current	3,406,969	3,334,313
Total Loans	3,488,579	3,423,008
Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	13,267	14,101
60 - 89 Days Past Due	2,204	2,554
Greater than 90 Days	12,062	13,297
Total Past Due	27,533	29,952
Current	1,695,231	1,682,087
Total Loans	1,722,764	1,712,039
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	4,876	5,029
60 - 89 Days Past Due	1,250	523
Greater than 90 Days	8,769	9,962
Total Past Due	14,895	15,514
Current	494,833	497,038
Total Loans	509,728	512,552
One-To-Four Family - Mixed-Use Property [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	13,193	14,017
60 - 89 Days Past Due	1,382	1,099
Greater than 90 Days	7,977	9,063
Total Past Due	22,552	24,179
Current	564,930	571,572
Total Loans	587,482	595,751
One-To-Four Family - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	1,849	3,828
60 - 89 Days Past Due	903	518
Greater than 90 Days	11,999	12,953
Total Past Due	14,751	17,299
Current	179,860	176,427
Total Loans	194,611	193,726
Co-Operative Apartments [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due		99
Greater than 90 Days		144
Total Past Due		243
Current	9,974	9,894
Total Loans	9,974	10,137
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,859	4,247
Total Loans	4,859	4,247
Small Business Administration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	198	106
Total Past Due	198	106
Current	7,430	7,686
Total Loans	7,628	7,792
Taxi Medallion [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	24,127	13,123
Total Loans	24,127	13,123
Commercial Business And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	483	187
60 - 89 Days Past Due		2
Greater than 90 Days	1,198	1,213
Total Past Due	1,681	1,402
Current	425,725	372,239
Total Loans	$ 427,406	$ 373,641