Loans, Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Modifications [Line Items]
Number of months continuous payment for reclassification of nonaccrual loans to accruing status	6 months
TDR loans	$ 6,905	$ 9,410
Specific reserves for TDR loans	939	1,596
TDR loans performing in compliance with modified terms	4,850	7,471
Troubled Debt Restructurings [Abstract]
Number of Contracts	12	7
Pre-modification outstanding recorded investment	1,103	1,365
Post-modification outstanding recorded investment	1,103	1,306
Loan restructured and subsequent default	136,000	0
Commitments to lend funds to borrowers whose terms have been modified	0
Commercial [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	5	3
Pre-modification outstanding recorded investment	470	445
Post-modification outstanding recorded investment	470	445
Loan restructured and subsequent default, Number of Contracts	1
Loan restructured and subsequent default	136,000
Residential Mortgage [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		1
Pre-modification outstanding recorded investment		404
Post-modification outstanding recorded investment		404
Residential Construction [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts		2
Pre-modification outstanding recorded investment		221
Post-modification outstanding recorded investment		162
Consumer [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts	7	1
Pre-modification outstanding recorded investment	633	295
Post-modification outstanding recorded investment	$ 633	$ 295