Note 5 - Loans (Details) - Age Analysis of Recorded Investment in Loans (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	$ 24,073	$ 25,147
60 - 89 Days Past Due	268	8,056
Greater than 90 Days	32,037	33,196
Total Past Due	56,378	66,399
Current	3,928,402	3,732,255
Total Loans	3,984,780	3,798,654	3,488,579
Multi-Family Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	8,595	7,721
60 - 89 Days Past Due		1,729
Greater than 90 Days	6,903	7,554
Total Past Due	15,498	17,004
Current	1,997,751	1,906,456
Total Loans	2,013,249	1,923,460	1,722,764
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	3,202	2,171
60 - 89 Days Past Due		1,344
Greater than 90 Days	3,774	6,510
Total Past Due	6,976	10,025
Current	680,847	611,544
Total Loans	687,823	621,569	509,728
One-To-Four Family - Mixed-Use Property [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	10,522	10,408
60 - 89 Days Past Due		1,154
Greater than 90 Days	7,418	7,341
Total Past Due	17,940	18,903
Current	555,987	554,876
Total Loans	573,927	573,779	587,482
One-To-Four Family - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	1,694	1,751
60 - 89 Days Past Due	175	2,244
Greater than 90 Days	11,022	11,051
Total Past Due	12,891	15,046
Current	177,475	172,526
Total Loans	190,366	187,572	194,611
Co-Operative Apartments [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,413	9,835
Total Loans	9,413	9,835	9,974
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due		3,000
Total Past Due		3,000
Current	2,828	2,286
Total Loans	2,828	5,286	4,859
Small Business Administration [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	56	90
60 - 89 Days Past Due	93
Greater than 90 Days	232
Total Past Due	381	90
Current	7,624	7,044
Total Loans	8,005	7,134	7,628
Taxi Medallion [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	21,346	22,519
Total Loans	21,346	22,519	24,127
Commercial Business And Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	4	6
60 - 89 Days Past Due		1,585
Greater than 90 Days	2,688	740
Total Past Due	2,692	2,331
Current	475,131	445,169
Total Loans	$ 477,823	$ 447,500	$ 427,406

Financing receivables that are less than 60 days past due but more than 29 days past due.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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