Note 18 - Fair Value of Financial Instruments (Details) - Carrying Amounts and Estimated Fair Values of Selected Financial Instruments as Well as Assumptions Used in Estimating Fair Value (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets:
Carrying Amount, Assets	$ 4,721,501	$ 4,451,416
Liabilities:
Carrying Amount, Liabilities	4,288,969	4,009,051
Borrowings [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Fair Value, Liabilities	1,005,229	968,147
Borrowings [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Fair Value, Liabilities	29,570	23,922
Borrowings [Member]
Liabilities:
Carrying Amount, Liabilities	1,012,122	948,405
Fair Value, Liabilities	1,034,799	992,069
Total Liabilities - Financial Instruments [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities:
Fair Value, Liabilities	2,111,825	1,761,964
Total Liabilities - Financial Instruments [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Fair Value, Liabilities	2,146,665	2,265,257
Total Liabilities - Financial Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Fair Value, Liabilities	29,570	23,922
Total Liabilities - Financial Instruments [Member]
Liabilities:
Carrying Amount, Liabilities	4,244,902	3,965,520
Fair Value, Liabilities	4,288,060	4,051,143
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Fair Value, Liabilities		1,922
Interest Rate Swaps [Member]
Liabilities:
Carrying Amount, Liabilities		1,922
Fair Value, Liabilities		1,922
Cash And Due From Banks [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value, Assets	33,485	40,425
Cash And Due From Banks [Member]
Assets:
Carrying Amount, Assets	33,485	40,425
Fair Value, Assets	33,485	40,425
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value, Assets	756,156	696,638
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value, Assets		23,475
Collateralized Mortgage Backed Securities [Member]
Assets:
Carrying Amount, Assets	756,156	720,113
Fair Value, Assets	756,156	720,113
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value, Assets	237,476	213,374
Other Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value, Assets	24,158	16,079
Other Securities [Member]
Assets:
Carrying Amount, Assets	261,634	229,453
Fair Value, Assets	261,634	229,453
Loans Held For Sale [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value, Assets	425	5,313
Loans Held For Sale [Member]
Assets:
Carrying Amount, Assets	425	5,313
Fair Value, Assets	425	5,313
Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value, Assets	3,502,792	3,416,313
Loans [Member]
Assets:
Carrying Amount, Assets	3,434,178	3,234,121
Fair Value, Assets	3,502,792	3,416,313
FHLB - NY Stock [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value, Assets	46,025	42,337
FHLB - NY Stock [Member]
Assets:
Carrying Amount, Assets	46,025	42,337
Fair Value, Assets	46,025	42,337
Interest Rate Caps [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value, Assets		19
Interest Rate Caps [Member]
Assets:
Carrying Amount, Assets		19
Fair Value, Assets		19
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value, Assets	2,081	3
Interest Rate Swaps [Member]
Assets:
Carrying Amount, Assets	2,081	3
Fair Value, Assets	2,081	3
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value, Assets	2,985	5,278
Other Real Estate Owned [Member]
Assets:
Carrying Amount, Assets	2,985	5,278
Fair Value, Assets	2,985	5,278
Total Assets - Financial Instruments [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Fair Value, Assets	33,485	40,425
Total Assets - Financial Instruments [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Fair Value, Assets	1,041,738	952,371
Total Assets - Financial Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Fair Value, Assets	3,530,360	3,466,458
Total Assets - Financial Instruments [Member]
Assets:
Carrying Amount, Assets	4,536,969	4,277,062
Fair Value, Assets	4,605,583	4,459,254
Deposits [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities:
Fair Value, Liabilities	2,111,825	1,761,964
Deposits [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Fair Value, Liabilities	1,141,436	1,295,188
Deposits [Member]
Liabilities:
Carrying Amount, Liabilities	3,232,780	3,015,193
Fair Value, Liabilities	$ 3,253,261	$ 3,057,152