Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Detail) - Borrowed funds and securities sold under agreements to repurchase: (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate (in Dollars)	$ 185,300	$ 185,300
Weighted Average Rate, repurchase agreements - fixed rate	3.47%	3.77%
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)	739,183	473,528
Weighted Average Rate, FHLB-NY advances - fixed rate	1.66%	2.67%
Junior subordinated debentures - adjustable rate
Due in 2037 (in Dollars)	61,900
Total borrowings (in Dollars)	948,405	685,139
Total borrowings	2.15%	3.51%
Due in 2012 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate (in Dollars)		18,000
Weighted Average Rate, repurchase agreements - fixed rate		4.71%
Due in 2013 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate (in Dollars)	30,000	30,000
Weighted Average Rate, repurchase agreements - fixed rate	2.92%	2.92%
Due in 2014 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate (in Dollars)	9,300	9,300
Weighted Average Rate, repurchase agreements - fixed rate	1.27%	1.27%
Due in 2016 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate (in Dollars)	88,000	70,000
Weighted Average Rate, repurchase agreements - fixed rate	3.42%	3.89%
Due in 2017 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate (in Dollars)	58,000	58,000
Weighted Average Rate, repurchase agreements - fixed rate	4.19%	4.19%
Due in 2012 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)		62,000
Weighted Average Rate, FHLB-NY advances - fixed rate		3.59%
Due in 2013 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)	142,000	10,000
Weighted Average Rate, FHLB-NY advances - fixed rate	0.40%	1.30%
Due in 2014 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)	129,911	79,911
Weighted Average Rate, FHLB-NY advances - fixed rate	2.07%	3.02%
Due in 2015 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)	166,349	115,964
Weighted Average Rate, FHLB-NY advances - fixed rate	1.21%	1.45%
Due in 2016 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)	158,636	96,919
Weighted Average Rate, FHLB-NY advances - fixed rate	1.53%	1.99%
Due in 2017 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate (in Dollars)	142,287	108,734
Weighted Average Rate, FHLB-NY advances - fixed rate	3.24%	3.93%
Due in 2037 [Member]
Junior subordinated debentures - adjustable rate
Due in 2037 (in Dollars)	$ 23,922	$ 26,311
Due in 2037	6.92%	16.96%