Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013 Contracts	Mar. 31, 2012 Contracts	Mar. 31, 2013 Contracts	Dec. 31, 2012 Contracts	Mar. 31, 2012 Contracts
Financing Receivable, Modifications [Line Items]
Chargeoffs on loans identified as TDR's	$ 68,000	$ 28,000
Loans modified for which there was payment default [Abstract]
Deferral period of past due loans	60 months
Real Estate Mortgage - 1 to 4 Family [Member]
Financing Receivable, Modifications [Line Items]
TDR's classifications from previously performing loans	11,400,000		11,400,000
New York and Other States [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	20	4	167	29
Pre-Modification Outstanding Recorded Investment	1,661,000	442,000	14,662,000	2,974,000
Post-Modification Outstanding Recorded Investment	1,661,000	434,000	14,662,000	2,712,000
Loans modified for which there was payment default [Abstract]
Number of Contracts			33		23
Recorded Investment			3,471,000		2,257,000
New York and Other States [Member] | Commercial [Member] | Commercial Real Estate [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	0	0	2	1
Pre-Modification Outstanding Recorded Investment	0	0	136,000	91,000
Post-Modification Outstanding Recorded Investment	0	0	136,000	90,000
Loans modified for which there was payment default [Abstract]
Number of Contracts			0		0
Recorded Investment			0		0
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	12	4	108	25
Pre-Modification Outstanding Recorded Investment	1,466,000	442,000	12,125,000	2,763,000
Post-Modification Outstanding Recorded Investment	1,466,000	434,000	12,125,000	2,516,000
Loans modified for which there was payment default [Abstract]
Number of Contracts			20		20
Recorded Investment			2,773,000		2,151,000
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	3	0	20	3
Pre-Modification Outstanding Recorded Investment	61,000	0	519,000	120,000
Post-Modification Outstanding Recorded Investment	61,000	0	519,000	106,000
Loans modified for which there was payment default [Abstract]
Number of Contracts			4		3
Recorded Investment			147,000		106,000
New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	5	0	37	0
Pre-Modification Outstanding Recorded Investment	134,000	0	1,882,000	0
Post-Modification Outstanding Recorded Investment	134,000	0	1,882,000	0
Loans modified for which there was payment default [Abstract]
Number of Contracts			9		0
Recorded Investment			551,000		0
Florida [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	3	1	15	5
Pre-Modification Outstanding Recorded Investment	387,000	163,000	1,480,000	682,000
Post-Modification Outstanding Recorded Investment	387,000	154,000	1,480,000	549,000
Loans modified for which there was payment default [Abstract]
Number of Contracts			5		5
Recorded Investment			607,000		549,000
Florida [Member] | Commercial [Member] | Commercial Real Estate [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	0	0	0	0
Pre-Modification Outstanding Recorded Investment	0	0	0	0
Post-Modification Outstanding Recorded Investment	0	0	0	0
Loans modified for which there was payment default [Abstract]
Number of Contracts			0		0
Recorded Investment			0		0
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	3	1	13	5
Pre-Modification Outstanding Recorded Investment	387,000	163,000	1,432,000	682,000
Post-Modification Outstanding Recorded Investment	387,000	154,000	1,432,000	549,000
Loans modified for which there was payment default [Abstract]
Number of Contracts			5		5
Recorded Investment			607,000		549,000
Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Modified loans by class determined to be TDR's [Abstract]
Number of Contracts	0	0	2	0
Pre-Modification Outstanding Recorded Investment	0	0	48,000	0
Post-Modification Outstanding Recorded Investment	0	0	48,000	0
Loans modified for which there was payment default [Abstract]
Number of Contracts			0		0
Recorded Investment			$ 0		$ 0