Loans (Additional Information) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Specific reserves to customers whose loan terms have been modified in troubled debt restructurings	$ 34		$ 34		$ 0	$ 108
Charge-offs due to troubled debt restructurings	0	0	0	0
Allowance for Loan and Lease Losses, Period Increase (Decrease)	(210)	0	(210)	0
Carrying amount, Net of Allowance	9,701,000		9,701,000		11,086,000
Troubled Debt Restructuring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	70		61
Subsequently Defaulted [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Specific reserves to customers whose loan terms have been modified in troubled debt restructurings	$ 0		$ 0