Note 5 - Loans (Details) - Age Analysis of Recorded Investment in Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	$ 37,782	$ 37,367
60 - 89 Days Past Due	2,515	4,696
Greater than 90 Days	41,662	46,632
Total Past Due	81,959	88,695
Current	3,439,767	3,334,313
Total Loans	3,521,726	3,423,008
Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	12,320	14,101
60 - 89 Days Past Due	1,325	2,554
Greater than 90 Days	10,860	13,297
Total Past Due	24,505	29,952
Current	1,759,606	1,682,087
Total Loans	1,784,111	1,712,039
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	8,615	5,029
60 - 89 Days Past Due		523
Greater than 90 Days	9,762	9,962
Total Past Due	18,377	15,514
Current	491,847	497,038
Total Loans	510,224	512,552
One-To-Four Family - Mixed-Use Property [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	14,325	14,017
60 - 89 Days Past Due	718	1,099
Greater than 90 Days	8,714	9,063
Total Past Due	23,757	24,179
Current	557,450	571,572
Total Loans	581,207	595,751
One-To-Four Family - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	2,363	3,828
60 - 89 Days Past Due	472	518
Greater than 90 Days	11,136	12,953
Total Past Due	13,971	17,299
Current	178,924	176,427
Total Loans	192,895	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	9,885	9,894
Total Loans	9,885	10,137
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,717	4,247
Total Loans	4,717	4,247
Small Business Administration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	108	106
Total Past Due	108	106
Current	7,435	7,686
Total Loans	7,543	7,792
Taxi Medallion [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	25,291	13,123
Total Loans	25,291	13,123
Commercial Business And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	51	187
60 - 89 Days Past Due		2
Greater than 90 Days	1,190	1,213
Total Past Due	1,241	1,402
Current	404,612	372,239
Total Loans	$ 405,853	$ 373,641