Loans and Allowance for Loan Losses, Impaired Receivables (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Impaired loans by loans class [Abstract]
Recorded Investment	$ 19,000	$ 13,700
New York and other states [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	9,680	8,006
Unpaid Principal Balance	10,859	9,289
Related Allowance	0	0
Average Recorded Investment	9,042	6,987
Interest Income Recognized	11	35
New York and other states [Member] | Commercial [Member] | Commercial real estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	5,530	4,968
Unpaid Principal Balance	5,958	5,684
Related Allowance	0	0
Average Recorded Investment	5,411	5,198
Interest Income Recognized	0	0
New York and other states [Member] | Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	126	13
Unpaid Principal Balance	116	32
Related Allowance	0	0
Average Recorded Investment	90	56
Interest Income Recognized	0	0
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	3,777	2,874
Unpaid Principal Balance	4,407	3,299
Related Allowance	0	0
Average Recorded Investment	3,345	1,664
Interest Income Recognized	11	30
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	141	151
Unpaid Principal Balance	198	199
Related Allowance	0	0
Average Recorded Investment	143	69
Interest Income Recognized	0	3
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	106	0
Unpaid Principal Balance	180	75
Related Allowance	0	0
Average Recorded Investment	53	0
Interest Income Recognized	0	2
Florida [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	9,362	5,705
Unpaid Principal Balance	13,933	10,343
Related Allowance	0	0
Average Recorded Investment	7,793	6,998
Interest Income Recognized	0	0
Florida [Member] | Commercial [Member] | Commercial real estate [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	8,435	5,000
Unpaid Principal Balance	12,190	9,042
Related Allowance	0	0
Average Recorded Investment	7,133	6,774
Interest Income Recognized	0	0
Florida [Member] | Commercial [Member] | Other [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	0	0
Unpaid Principal Balance	6	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Florida [Member] | Real estate mortgage - 1 to 4 family [Member] | First mortgages [Member]
Impaired loans by loans class [Abstract]
Recorded Investment	927	705
Unpaid Principal Balance	1,737	1,301
Related Allowance	0	0
Average Recorded Investment	660	224
Interest Income Recognized	0	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	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
Interest Income Recognized	$ 0