Note 5 - Loans (Details) - Age analysis of recorded investment in loans: (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	$ 46,942	$ 61,110
60 - 89 Days Past Due	6,989	13,833
Greater than 90 Days	72,047	82,703
Total Past Due	125,978	157,646
Current	3,150,108	3,063,729
Total Loans	3,276,086	3,221,375
Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	17,221	24,059
60 - 89 Days Past Due	1,739	4,828
Greater than 90 Days	19,273	13,095
Total Past Due	38,233	41,982
Current	1,568,857	1,492,456
Total Loans	1,607,090	1,534,438
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	6,693	9,764
60 - 89 Days Past Due	686	3,622
Greater than 90 Days	12,676	15,639
Total Past Due	20,055	29,025
Current	506,008	486,413
Total Loans	526,063	515,438
One-To-Four Family - Mixed-Use Property [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	19,345	21,012
60 - 89 Days Past Due	2,499	3,368
Greater than 90 Days	11,447	16,554
Total Past Due	33,291	40,934
Current	571,963	596,419
Total Loans	605,254	637,353
One-To-Four Family - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	3,568	3,407
60 - 89 Days Past Due	1,564	2,010
Greater than 90 Days	11,945	13,602
Total Past Due	17,077	19,019
Current	179,241	179,949
Total Loans	196,318	198,968
Co-Operative Apartments [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater than 90 Days	160	234
Total Past Due	160	234
Current	9,175	6,069
Total Loans	9,335	6,303
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due		2,462
Greater than 90 Days	7,326	7,695
Total Past Due	7,326	10,157
Current	4,124	4,224
Total Loans	11,450	14,381
Small Business Administration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	114	404
Greater than 90 Days	445	283
Total Past Due	559	687
Current	8,006	8,809
Total Loans	8,565	9,496
Taxi Medallion [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,114	9,922
Total Loans	5,114	9,922
Commercial Business And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	1	2
60 - 89 Days Past Due	501	5
Greater than 90 Days	8,775	15,601
Total Past Due	9,277	15,608
Current	297,620	279,468
Total Loans	$ 306,897	$ 295,076