Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Detail) - Borrowings which have call provisions: (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Repurchase agreement 1 [Member]	Dec. 31, 2012 Repurchase agreement 2 [Member]	Dec. 31, 2012 Repurchase agreement 3 [Member]	Dec. 31, 2012 Repurchase agreement 4 [Member]	Dec. 31, 2012 Repurchase agreement 5 [Member]	Dec. 31, 2012 Repurchase agreement 6 [Member]	Dec. 31, 2012 Repurchase agreement 7 [Member]	Dec. 31, 2012 Repurchase agreement 8 [Member]	Dec. 31, 2012 Repurchase agreement 9 [Member]	Dec. 31, 2012 Repurchase agreement 10 [Member]	Dec. 31, 2012 Repurchase agreement 11 [Member]	Dec. 31, 2012 FHLB - NY advance 1 [Member]	Dec. 31, 2012 FHLB - NY advance 2 [Member]	Dec. 31, 2012 FHLB - NY advance 3 [Member]	Dec. 31, 2012 FHLB - NY advance 4 [Member]	Dec. 31, 2012 FHLB - NY advance 5 [Member]
Amount, Repurchase agreements - fixed rate (in Dollars)	$ 185,300	$ 185,300	$ 18,000	$ 10,000	$ 20,000	$ 10,000	$ 10,000	$ 10,000	$ 20,000	$ 20,000	$ 10,000	$ 18,000	$ 20,000
Rate, Repurchase agreements - fixed rate			4.28%	4.89%	5.02%	3.99%	2.81%	2.91%	4.05%	4.26%	3.88%	1.60%	2.20%
Maturity Date, Repurchase agreements - fixed rate			10/18/2017	7/28/2016	7/28/2016	7/27/2016	5/7/2013	8/7/2013	9/19/2017	9/21/2017	6/27/2016	4/19/2016	7/12/2016	10/10/2017	10/10/2017	9/18/2017	9/18/2017	9/18/2017
Call Date, Repurchase agreements - fixed rate			1/18/2013	1/28/2013	1/28/2013	1/28/2013	2/7/2013	2/7/2013	3/19/2013	3/21/2013	3/27/2013	4/21/2014	7/14/2014	1/9/2013	1/9/2013	3/18/2013	3/18/2013	3/18/2013
Amount, FHLB-NY advances - fixed rate (in Dollars)	$ 739,183	$ 473,528												$ 20,000	$ 30,000	$ 10,000	$ 10,000	$ 10,000
Rate, FHLB-NY advances - fixed rate														4.43%	4.60%	4.13%	4.32%	4.15%
Maturity Date, FHLB-NY advances - fixed rate			10/18/2017	7/28/2016	7/28/2016	7/27/2016	5/7/2013	8/7/2013	9/19/2017	9/21/2017	6/27/2016	4/19/2016	7/12/2016	10/10/2017	10/10/2017	9/18/2017	9/18/2017	9/18/2017
Call Date, FHLB-NY advances - fixed rate			1/18/2013	1/28/2013	1/28/2013	1/28/2013	2/7/2013	2/7/2013	3/19/2013	3/21/2013	3/27/2013	4/21/2014	7/14/2014	1/9/2013	1/9/2013	3/18/2013	3/18/2013	3/18/2013