Loans and Allowance for Loan Losses, Impaired Receivables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Impaired loans by loans class [Abstract]
Recorded Investment	$ 26,049	$ 26,073
Unpaid Principal Balance	29,811	30,566
Related Allowance	0	0
Average Recorded Investment	22,978	19,358
Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	5,313	9,209
Unpaid Principal Balance	6,825	11,059
Related Allowance	0	0
Average Recorded Investment	5,756	11,486
Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	123	124
Unpaid Principal Balance	123	124
Related Allowance	0	0
Average Recorded Investment	123	107
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	17,366	14,436
Unpaid Principal Balance	19,099	16,808
Related Allowance	0	0
Average Recorded Investment	14,660	7,023
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	634	623
Unpaid Principal Balance	753	664
Related Allowance	0	0
Average Recorded Investment	539	260
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,613	1,681
Unpaid Principal Balance	3,011	1,911
Related Allowance	0	0
Average Recorded Investment	1,900	482
New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	24,138	21,855
Unpaid Principal Balance	27,308	23,835
Related Allowance	0	0
Average Recorded Investment	21,734	12,515
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	5,313	6,511
Unpaid Principal Balance	6,825	7,169
Related Allowance	0	0
Average Recorded Investment	5,756	5,615
New York and Other States [Member] | Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	123	124
Unpaid Principal Balance	123	124
Related Allowance	0	0
Average Recorded Investment	123	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	15,548	12,964
Unpaid Principal Balance	16,779	14,143
Related Allowance	0	0
Average Recorded Investment	13,455	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	634	623
Unpaid Principal Balance	753	664
Related Allowance	0	0
Average Recorded Investment	539	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	2,520	1,633
Unpaid Principal Balance	2,828	1,735
Related Allowance	0	0
Average Recorded Investment	1,861	458
Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	1,911	4,218
Unpaid Principal Balance	2,503	6,731
Related Allowance	0	0
Average Recorded Investment	1,244	6,843
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	0	2,698
Unpaid Principal Balance	0	3,890
Related Allowance	0	0
Average Recorded Investment	0	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	1,818	1,472
Unpaid Principal Balance	2,320	2,665
Related Allowance	0	0
Average Recorded Investment	1,205	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	93	48
Unpaid Principal Balance	183	176
Related Allowance	0	0
Average Recorded Investment	$ 39	$ 24