Loans and Allowance for Loan Losses (Details 12) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 7,054	$ 18,324
Allowance for Loan Losses Allocated to Troubled Debt Restructurings	708	904
Commercial Real Estate [Member] | Accrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	4,737	16,010
Commercial Real Estate [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,317	2,314
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	6,775	12,450
Allowance for Loan Losses Allocated to Troubled Debt Restructurings	554	1,960
Commercial Construction [Member] | Accrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,479	11,420
Commercial Construction [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	4,296	1,030
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	118	1,351
Allowance for Loan Losses Allocated to Troubled Debt Restructurings	12	0
Commercial and Industrial [Member] | Accrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	118	322
Commercial and Industrial [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	0	1,029
Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	7,272	12,654
Allowance for Loan Losses Allocated to Troubled Debt Restructurings	1,072	1,165
Residential Mortgage [Member] | Accrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	5,282	8,015
Residential Mortgage [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	1,990	4,639
Consumer and Other [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	63	133
Allowance for Loan Losses Allocated to Troubled Debt Restructurings	86	0
Consumer and Other [Member] | Accrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	23	122
Consumer and Other [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	40	11
Total Troubled Debt Restructurings [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	21,282	44,912
Allowance for Loan Losses Allocated to Troubled Debt Restructurings	2,432	4,029
Total Number Of Contracts	49	64
Total Troubled Debt Restructurings [Member] | Accrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	12,639	35,889
Total Number Of Contracts	33	44
Total Troubled Debt Restructurings [Member] | Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 8,643	$ 9,023
Total Number Of Contracts	16	20