Loans Receivable and Related Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Unpaid Principal Balance	$ 2,678	$ 2,665
Recorded Investment	4,000	4,100
Related Allowance	1,400	1,400
Loans Receivable With Specific Allowance [Member]
Unpaid Principal Balance	4,178	4,242
Recorded Investment	4,004	4,068
Related Allowance	1,370	1,448
Average Recorded Investment	4,036	2,075
Interest Income Recognized in Period	4	186
Cash Basis Interest Recognized in Period	4	16
Loans Receivable With No Specific Allowance [Member]
Unpaid Principal Balance	2,667	2,774
Recorded Investment	2,417	2,524
Average Recorded Investment	2,471	2,832
Interest Income Recognized in Period	1	17
Cash Basis Interest Recognized in Period	1	17
Residential First Mortgages [Member] | Loans Receivable With Specific Allowance [Member]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	0	0
Residential First Mortgages [Member] | Loans Receivable With No Specific Allowance [Member]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Average Recorded Investment	0	0
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	0	0
Home Equity [Member] | Loans Receivable With Specific Allowance [Member]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	0	0
Home Equity [Member] | Loans Receivable With No Specific Allowance [Member]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Average Recorded Investment	0	0
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	0	0
Commercial Real Estate [Member] | Loans Receivable With Specific Allowance [Member]
Unpaid Principal Balance	4,178	4,242
Recorded Investment	4,004	4,068
Related Allowance	1,370	1,448
Average Recorded Investment	4,036	2,075
Interest Income Recognized in Period	4	186
Cash Basis Interest Recognized in Period	4	16
Commercial Real Estate [Member] | Loans Receivable With No Specific Allowance [Member]
Unpaid Principal Balance	689	730
Recorded Investment	464	505
Average Recorded Investment	485	690
Interest Income Recognized in Period	1	12
Cash Basis Interest Recognized in Period	1	12
Commercial Business [Member] | Loans Receivable With Specific Allowance [Member]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	0	0
Commercial Business [Member] | Loans Receivable With No Specific Allowance [Member]
Unpaid Principal Balance	389	394
Recorded Investment	364	369
Average Recorded Investment	367	368
Interest Income Recognized in Period	0	5
Cash Basis Interest Recognized in Period	0	5
Consumer [Member] | Loans Receivable With Specific Allowance [Member]
Unpaid Principal Balance	0	0
Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	0	0
Consumer [Member] | Loans Receivable With No Specific Allowance [Member]
Unpaid Principal Balance	1,589	1,650
Recorded Investment	1,589	1,650
Average Recorded Investment	1,619	1,774
Interest Income Recognized in Period	0	0
Cash Basis Interest Recognized in Period	$ 0	$ 0