Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) - Borrowed Funds and Securities Sold Under Agreements to Repurchase (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate	$ 116,000	$ 155,300
Weighted Average Rate, repurchase agreements - fixed rate	3.18%	3.41%
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate	911,721	827,252
Weighted Average Rate, FHLB-NY advances - fixed rate	1.44%	1.48%
Junior subordinated debentures - adjustable rate
Due in 2037	61,900
Total borrowings	1,056,492	1,012,122
Total borrowings	1.75%	1.90%
Due in 2014 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate		9,300
Weighted Average Rate, repurchase agreements - fixed rate		1.27%
Due in 2016 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate	38,000	68,000
Weighted Average Rate, repurchase agreements - fixed rate	1.92%	3.27%
Due in 2017 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate	38,000	38,000
Weighted Average Rate, repurchase agreements - fixed rate	4.16%	4.16%
Due in 2020 [Member]
Repurchase agreements - fixed rate:
Amount, repurchase agreements - fixed rate	40,000	40,000
Weighted Average Rate, repurchase agreements - fixed rate	3.45%	3.45%
Due in 2037 [Member]
Junior subordinated debentures - adjustable rate
Due in 2037	28,771	29,570
Due in 2037	5.96%	5.67%
Due in 2014 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate		89,500
Weighted Average Rate, FHLB-NY advances - fixed rate		0.63%
Due in 2015 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate	185,551	166,732
Weighted Average Rate, FHLB-NY advances - fixed rate	0.80%	1.21%
Due in 2016 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate	315,847	331,062
Weighted Average Rate, FHLB-NY advances - fixed rate	1.15%	1.20%
Due in 2017 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate	305,525	174,160
Weighted Average Rate, FHLB-NY advances - fixed rate	2.12%	2.79%
Due in 2018 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate	74,798	65,798
Weighted Average Rate, FHLB-NY advances - fixed rate	1.29%	1.24%
Due in 2019 [Member]
FHLB-NY advances - fixed rate:
Amount, FHLB-NY advances - fixed rate	$ 30,000
Weighted Average Rate, FHLB-NY advances - fixed rate	1.83%