Loans and Allowance for Loan Losses, Impaired Receivables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Impaired loans by loans class [Abstract]
Recorded Investment	$ 26,591	$ 26,073
Unpaid Principal Balance	31,485	30,566
Related Allowance	0	0
Average Recorded Investment	26,042	19,358
Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	8,449	9,209
Unpaid Principal Balance	10,649	11,059
Related Allowance	0	0
Average Recorded Investment	8,655	11,486
Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	124	124
Unpaid Principal Balance	124	124
Related Allowance	0	0
Average Recorded Investment	124	107
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	15,528	14,436
Unpaid Principal Balance	17,738	16,808
Related Allowance	0	0
Average Recorded Investment	14,806	7,023
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	677	623
Unpaid Principal Balance	719	664
Related Allowance	0	0
Average Recorded Investment	676	260
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	1,813	1,681
Unpaid Principal Balance	2,255	1,911
Related Allowance	0	0
Average Recorded Investment	1,781	482
New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	22,312	21,855
Unpaid Principal Balance	24,764	23,835
Related Allowance	0	0
Average Recorded Investment	21,898	12,515
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	5,854	6,511
Unpaid Principal Balance	6,762	7,169
Related Allowance	0	0
Average Recorded Investment	6,025	5,615
New York and Other States [Member] | Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	124	124
Unpaid Principal Balance	124	124
Related Allowance	0	0
Average Recorded Investment	124	107
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	13,892	12,964
Unpaid Principal Balance	15,080	14,143
Related Allowance	0	0
Average Recorded Investment	13,340	6,075
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	677	623
Unpaid Principal Balance	719	664
Related Allowance	0	0
Average Recorded Investment	676	260
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	1,765	1,633
Unpaid Principal Balance	2,079	1,735
Related Allowance	0	0
Average Recorded Investment	1,733	458
Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	4,279	4,218
Unpaid Principal Balance	6,721	6,731
Related Allowance	0	0
Average Recorded Investment	4,144	6,843
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,595	2,698
Unpaid Principal Balance	3,887	3,890
Related Allowance	0	0
Average Recorded Investment	2,630	5,871
Florida [Member] | Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	1,636	1,472
Unpaid Principal Balance	2,658	2,665
Related Allowance	0	0
Average Recorded Investment	1,466	948
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	48	48
Unpaid Principal Balance	176	176
Related Allowance	0	0
Average Recorded Investment	$ 48	$ 24