Loans and Allowance for Loan Losses, Impaired Receivables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Impaired loans by loans class [Abstract]
Recorded Investment	$ 25,365	$ 26,073
Unpaid Principal Balance	28,641	30,566
Related Allowance	0	0
Average Recorded Investment	25,066	19,358
Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	6,351	9,209
Unpaid Principal Balance	7,734	11,059
Related Allowance	0	0
Average Recorded Investment	8,000	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	124	107
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	16,366	14,436
Unpaid Principal Balance	17,936	16,808
Related Allowance	0	0
Average Recorded Investment	14,551	7,023
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	687	623
Unpaid Principal Balance	819	664
Related Allowance	0	0
Average Recorded Investment	636	260
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	1,838	1,681
Unpaid Principal Balance	2,029	1,911
Related Allowance	0	0
Average Recorded Investment	1,755	482
New York and Other States [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	23,253	21,855
Unpaid Principal Balance	25,444	23,835
Related Allowance	0	0
Average Recorded Investment	21,901	12,515
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	5,768	6,511
Unpaid Principal Balance	6,696	7,169
Related Allowance	0	0
Average Recorded Investment	6,058	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	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	14,868	12,964
Unpaid Principal Balance	15,826	14,143
Related Allowance	0	0
Average Recorded Investment	13,339	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	687	623
Unpaid Principal Balance	819	664
Related Allowance	0	0
Average Recorded Investment	636	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	1,807	1,633
Unpaid Principal Balance	1,980	1,735
Related Allowance	0	0
Average Recorded Investment	1,744	458
Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	2,112	4,218
Unpaid Principal Balance	3,197	6,731
Related Allowance	0	0
Average Recorded Investment	3,165	6,843
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	583	2,698
Unpaid Principal Balance	1,038	3,890
Related Allowance	0	0
Average Recorded Investment	1,942	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	1,498	1,472
Unpaid Principal Balance	2,110	2,665
Related Allowance	0	0
Average Recorded Investment	1,212	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	31	48
Unpaid Principal Balance	49	176
Related Allowance	0	0
Average Recorded Investment	$ 11	$ 24