Note 5 - Loans (Details) - Activity in the Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended						6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Multi-Family Residential [Member] For the three months ended [Member]	Jun. 30, 2013 Multi-Family Residential [Member] For the three months ended [Member]	Jun. 30, 2014 Multi-Family Residential [Member]	Jun. 30, 2013 Multi-Family Residential [Member]	Jun. 30, 2014 Commercial Real Estate Loans [Member] For the three months ended [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member] For the three months ended [Member]	Jun. 30, 2014 Commercial Real Estate Loans [Member]	Jun. 30, 2013 Commercial Real Estate Loans [Member]	Jun. 30, 2014 One-To-Four Family - Mixed-Use Property [Member] For the three months ended [Member]	Jun. 30, 2013 One-To-Four Family - Mixed-Use Property [Member] For the three months ended [Member]	Jun. 30, 2014 One-To-Four Family - Mixed-Use Property [Member]	Jun. 30, 2013 One-To-Four Family - Mixed-Use Property [Member]	Jun. 30, 2014 One-To-Four Family - Residential [Member] For the three months ended [Member]	Jun. 30, 2013 One-To-Four Family - Residential [Member] For the three months ended [Member]	Jun. 30, 2014 One-To-Four Family - Residential [Member]	Jun. 30, 2013 One-To-Four Family - Residential [Member]	Jun. 30, 2013 Co-Operative Apartments [Member] For the three months ended [Member]	Jun. 30, 2014 Co-Operative Apartments [Member] For the three months ended [Member]	Jun. 30, 2014 Co-Operative Apartments [Member]	Jun. 30, 2013 Co-Operative Apartments [Member]	Jun. 30, 2014 Construction [Member] For the three months ended [Member]	Jun. 30, 2013 Construction [Member] For the three months ended [Member]	Jun. 30, 2014 Construction [Member]	Jun. 30, 2013 Construction [Member]	Jun. 30, 2014 Small Business Administration [Member] For the three months ended [Member]	Jun. 30, 2013 Small Business Administration [Member] For the three months ended [Member]	Jun. 30, 2014 Small Business Administration [Member]	Jun. 30, 2013 Small Business Administration [Member]	Jun. 30, 2014 Taxi Medallion [Member] For the three months ended [Member]	Mar. 31, 2014 Taxi Medallion [Member] For the three months ended [Member]	Jun. 30, 2013 Taxi Medallion [Member] For the three months ended [Member]	Mar. 31, 2013 Taxi Medallion [Member] For the three months ended [Member]	Jun. 30, 2014 Taxi Medallion [Member]	Jun. 30, 2013 Taxi Medallion [Member]	Dec. 31, 2012 Taxi Medallion [Member]	Jun. 30, 2014 Commercial Business And Other [Member] For the three months ended [Member]	Jun. 30, 2013 Commercial Business And Other [Member] For the three months ended [Member]	Jun. 30, 2014 Commercial Business And Other [Member]	Jun. 30, 2013 Commercial Business And Other [Member]	Jun. 30, 2014 For the three months ended [Member]	Jun. 30, 2013 For the three months ended [Member]	Jun. 30, 2014	Jun. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	$ 30,270	$ 31,027	$ 31,776	$ 31,104	$ 11,103	$ 12,395	$ 12,084	$ 13,001	$ 5,379	$ 5,660	$ 4,959	$ 5,705	$ 7,142	$ 6,340	$ 6,328	$ 5,960	$ 1,944	$ 2,077	$ 2,079	$ 1,999	$ 88		$ 104	$ 46	$ 40	$ 67	$ 444	$ 66	$ 391	$ 471	$ 458	$ 505	$ 14	$ 14	$ 7	$ 7		$ 7	$ 7	$ 4,257	$ 3,922	$ 5,320	$ 3,815	$ 30,270	$ 31,027	$ 31,776	$ 31,104
Balance	29,235	32,355	29,235	32,355	10,750	12,958	10,750	12,958	5,327	5,884	5,327	5,884	6,993	6,434	6,993	6,434	1,790	2,099	1,790	2,099	99			99	34	196	34	196	373	497	373	497	14	14	7	7	14	7	7	3,954	4,181	3,954	4,181	29,235	32,355	29,235	32,355
Allowance for Credit Losses, Ending balance: individually evaluated for impairment					299	272	299	272	197	290	197	290	601	693	601	693	56	60	56	60						34		34												150	377	150	377	1,303	1,726	1,303	1,726
Allowance for Credit Losses, Ending balance: collectively evaluated for impairment					10,451	12,686	10,451	12,686	5,130	5,594	5,130	5,594	6,392	5,741	6,392	5,741	1,734	2,039	1,734	2,039	99			99	34	162	34	162	373	497	373	497	14		7		14	7		3,804	3,804	3,804	3,804	27,932	30,629	27,932	30,629
Charge-off's	(370)	(2,606)	(1,271)	(8,888)	(69)	(1,261)	(674)	(2,749)	(39)	(53)	(86)	(734)	(175)	(529)	(258)	(3,135)	(37)		(79)	(691)				(74)		(70)		(304)	(49)	(133)	(49)	(337)								(1)	(560)	(125)	(864)	(370)	(2,606)	(1,271)	(8,888)
Recoveries	427	434	941	639	134	54	141	65		213	382	293	95	58	135	111	97	75	165	106	4		7	4					51	30	61	60								50		50		427	434	941	639
Provision (benefit)					(418)	1,770	(801)	2,641	(13)	64	72	620	(69)	565	788	3,498	(214)	(53)	(375)	685	7		(111)	123	(6)	199	(410)	434	(20)	129	(97)	269					14			(352)	819	(1,291)	1,230	(1,092)	3,500	(2,211)	9,500
Financing Receivables, Ending balance					1,784,111	1,607,090	1,784,111	1,607,090	510,224	526,063	510,224	526,063	581,207	605,254	581,207	605,254	192,895	196,318	192,895	196,318	9,335	9,885	9,885	9,335	4,717	11,450	4,717	11,450	7,543	8,565	7,543	8,565	25,291		5,114		25,291	5,114		405,853	306,897	405,853	306,897	3,521,726	3,276,086	3,521,726	3,276,086
Financing Receivables, Ending balance: individually evaluated for impairment					20,613	26,012	20,613	26,012	16,728	34,895	16,728	34,895	16,704	19,146	16,704	19,146	13,505	14,530	13,505	14,530	266			266	570	9,710	570	9,710		483		483								7,899	7,551	7,899	7,551	76,019	112,593	76,019	112,593
Financing Receivables, Ending balance: collectively evaluated for impairment					$ 1,763,498	$ 1,581,078	$ 1,763,498	$ 1,581,078	$ 493,496	$ 491,168	$ 493,496	$ 491,168	$ 564,503	$ 586,108	$ 564,503	$ 586,108	$ 179,390	$ 181,788	$ 179,390	$ 181,788	$ 9,069	$ 9,885	$ 9,885	$ 9,069	$ 4,147	$ 1,740	$ 4,147	$ 1,740	$ 7,543	$ 8,082	$ 7,543	$ 8,082	$ 25,291		$ 5,114		$ 25,291	$ 5,114		$ 397,954	$ 299,346	$ 397,954	$ 299,346	$ 3,445,707	$ 3,163,493	$ 3,445,707	$ 3,163,493