Note 5 - Loans (Details) - Age Analysis of Recorded Investment in Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	$ 35,985	$ 37,367
60 - 89 Days Past Due	8,158	4,696
Greater than 90 Days	33,466	46,632
Total Past Due	77,609	88,695
Current	3,557,190	3,334,313
Total Loans	3,634,799	3,423,008
Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	11,095	14,101
60 - 89 Days Past Due	2,728	2,554
Greater than 90 Days	7,287	13,297
Total Past Due	21,110	29,952
Current	1,784,940	1,682,087
Total Loans	1,806,050	1,712,039
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	7,978	5,029
60 - 89 Days Past Due	936	523
Greater than 90 Days	5,972	9,962
Total Past Due	14,886	15,514
Current	551,093	497,038
Total Loans	565,979	512,552
One-To-Four Family - Mixed-Use Property [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	13,731	14,017
60 - 89 Days Past Due	2,835	1,099
Greater than 90 Days	9,084	9,063
Total Past Due	25,650	24,179
Current	551,391	571,572
Total Loans	577,041	595,751
One-To-Four Family - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	3,081	3,828
60 - 89 Days Past Due	1,568	518
Greater than 90 Days	10,814	12,953
Total Past Due	15,463	17,299
Current	176,238	176,427
Total Loans	191,701	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	9,779	9,894
Total Loans	9,779	10,137
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,121	4,247
Total Loans	5,121	4,247
Small Business Administration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	96	106
Total Past Due	96	106
Current	7,440	7,686
Total Loans	7,536	7,792
Taxi Medallion [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	22,667	13,123
Total Loans	22,667	13,123
Commercial Business And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	4	187
60 - 89 Days Past Due	91	2
Greater than 90 Days	309	1,213
Total Past Due	404	1,402
Current	448,521	372,239
Total Loans	$ 448,925	$ 373,641