Note 5 - Loans (Details) - Activity in the Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended					9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014 Multi-Family Residential [Member] For the three months ended [Member]	Sep. 30, 2013 Multi-Family Residential [Member] For the three months ended [Member]	Sep. 30, 2014 Multi-Family Residential [Member]	Sep. 30, 2013 Multi-Family Residential [Member]	Sep. 30, 2014 Commercial Real Estate Loans [Member] For the three months ended [Member]	Sep. 30, 2013 Commercial Real Estate Loans [Member] For the three months ended [Member]	Sep. 30, 2014 Commercial Real Estate Loans [Member]	Sep. 30, 2013 Commercial Real Estate Loans [Member]	Sep. 30, 2014 One-To-Four Family - Mixed-Use Property [Member] For the three months ended [Member]	Sep. 30, 2013 One-To-Four Family - Mixed-Use Property [Member] For the three months ended [Member]	Sep. 30, 2014 One-To-Four Family - Mixed-Use Property [Member]	Sep. 30, 2013 One-To-Four Family - Mixed-Use Property [Member]	Sep. 30, 2014 One-To-Four Family - Residential [Member] For the three months ended [Member]	Sep. 30, 2013 One-To-Four Family - Residential [Member] For the three months ended [Member]	Sep. 30, 2014 One-To-Four Family - Residential [Member]	Sep. 30, 2013 One-To-Four Family - Residential [Member]	Sep. 30, 2014 Co-Operative Apartments [Member] For the three months ended [Member]	Sep. 30, 2013 Co-Operative Apartments [Member] For the three months ended [Member]	Jun. 30, 2013 Co-Operative Apartments [Member] For the three months ended [Member]	Sep. 30, 2014 Co-Operative Apartments [Member]	Sep. 30, 2013 Co-Operative Apartments [Member]	Sep. 30, 2014 Construction [Member] For the three months ended [Member]	Sep. 30, 2013 Construction [Member] For the three months ended [Member]	Sep. 30, 2014 Construction [Member]	Sep. 30, 2013 Construction [Member]	Sep. 30, 2014 Small Business Administration [Member] For the three months ended [Member]	Sep. 30, 2013 Small Business Administration [Member] For the three months ended [Member]	Sep. 30, 2014 Small Business Administration [Member]	Sep. 30, 2013 Small Business Administration [Member]	Sep. 30, 2014 Taxi Medallion [Member] For the three months ended [Member]	Sep. 30, 2013 Taxi Medallion [Member] For the three months ended [Member]	Sep. 30, 2014 Taxi Medallion [Member]	Sep. 30, 2013 Taxi Medallion [Member]	Sep. 30, 2014 Commercial Business And Other [Member] For the three months ended [Member]	Sep. 30, 2013 Commercial Business And Other [Member] For the three months ended [Member]	Sep. 30, 2014 Commercial Business And Other [Member]	Sep. 30, 2013 Commercial Business And Other [Member]	Sep. 30, 2014 For the three months ended [Member]	Sep. 30, 2013 For the three months ended [Member]	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance	$ 10,750	$ 12,958	$ 12,084	$ 13,001	$ 5,327	$ 5,884	$ 4,959	$ 5,705	$ 6,993	$ 6,434	$ 6,328	$ 5,960	$ 1,790	$ 2,099	$ 2,079	$ 1,999		$ 99	$ 99	$ 104	$ 46	$ 34	$ 196	$ 444	$ 66	$ 373	$ 497	$ 458	$ 505	$ 14	$ 4		$ 7	$ 3,954	$ 4,184	$ 5,320	$ 3,815	$ 29,235	$ 32,355	$ 31,776	$ 31,104
Balance	10,144	11,777	10,144	11,777	4,986	5,110	4,986	5,110	6,670	5,923	6,670	5,923	1,774	1,954	1,774	1,954		99	99		99	41	265	41	265	351	496	351	496	11		11		4,367	5,192	4,367	5,192	28,344	30,816	28,344	30,816
Allowance for Credit Losses, Ending balance: individually evaluated for impairment	292	265	292	265	23	270	23	270	591	649	591	649	55	59	55	59							17		17									168	166	168	166	1,129	1,426	1,129	1,426
Allowance for Credit Losses, Ending balance: collectively evaluated for impairment	9,852	11,512	9,852	11,512	4,963	4,840	4,963	4,840	6,079	5,274	6,079	5,274	1,719	1,895	1,719	1,895		99			99	41	248	41	248	351	496	351	496	11		11		4,199	5,026	4,199	5,026	27,215	29,390	27,215	29,390
Charge-off's	(412)	(710)	(1,086)	(3,459)	(221)	(171)	(307)	(905)	(47)	(645)	(305)	(3,780)	(18)	(4)	(97)	(695)					(74)		(2,374)		(2,678)		(89)	(49)	(426)					(5)	(1,193)	(130)	(2,057)	(703)	(5,186)	(1,974)	(14,074)
Recoveries	3	90	144	155	99		481	293	196	58	331	169	104	11	269	117				7	4					15	17	76	77					13	36	63	36	430	212	1,371	851
Provision (benefit)	(197)	(561)	(998)	2,080	(219)	(603)	(147)	17	(472)	76	316	3,574	(102)	(152)	(477)	533				(111)	123	7	2,443	(403)	2,877	(37)	71	(134)	340	(3)	(4)	11	(7)	405	2,165	(886)	3,398	(618)	3,435	(2,829)	12,935
Financing Receivables, Ending balance	1,806,050	1,684,277	1,806,050	1,684,277	565,979	516,314	565,979	516,314	577,041	595,435	577,041	595,435	191,701	196,659	191,701	196,659	9,779	10,165		9,779	10,165	5,121	4,645	5,121	4,645	7,536	8,003	7,536	8,003	22,667	5,088	22,667	5,088	448,925	364,069	448,925	364,069	3,634,799	3,384,655	3,634,799	3,384,655
Financing Receivables, Ending balance: individually evaluated for impairment	13,643	26,068	13,643	26,068	12,525	24,738	12,525	24,738	16,516	16,980	16,516	16,980	12,874	15,120	12,874	15,120		164			164		2,341		2,341									6,787	5,110	6,787	5,110	62,345	90,521	62,345	90,521
Financing Receivables, Ending balance: collectively evaluated for impairment	$ 1,792,407	$ 1,658,209	$ 1,792,407	$ 1,658,209	$ 553,454	$ 491,576	$ 553,454	$ 491,576	$ 560,525	$ 578,455	$ 560,525	$ 578,455	$ 178,827	$ 181,539	$ 178,827	$ 181,539	$ 9,779	$ 10,001		$ 9,779	$ 10,001	$ 5,121	$ 2,304	$ 5,121	$ 2,304	$ 7,536	$ 8,003	$ 7,536	$ 8,003	$ 22,667	$ 5,088	$ 22,667	$ 5,088	$ 442,138	$ 358,959	$ 442,138	$ 358,959	$ 3,572,454	$ 3,294,134	$ 3,572,454	$ 3,294,134