Loans and Leases and the Allowance for Loan and Lease Losses (Details 6-narrative) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013 contract	Sep. 30, 2012 contract	Sep. 30, 2013 contract	Sep. 30, 2012 contract	Dec. 31, 2012
Loans and Leases and the Allowance for Loan and Lease Losses
Loans modified in a TDR			$ 51,500,000		$ 41,100,000
Available commitments under Revolving Credit Lines, Modified as TDR			900,000
Period of Time Monthly Payments Lowered to Accommodate Borrowers Financial Needs			2 years
Loans Modified as a TDR
Number of Contracts	55	66	168	158
Recorded Investment (as of period end)	5,231,000	3,392,000	18,490,000	9,575,000
Increase in Allowance (as of period end)	118,000	516,000	1,525,000	965,000
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date
Number of Contracts	3	3	10	8
Recorded Investment (as of period end)	25,000	6,000	581,000	734,000
Minimum
Loans and Leases and the Allowance for Loan and Lease Losses
Default period past due following modification of loans in TDR (in days)			60 days
Land Loan | Minimum
Loans and Leases and the Allowance for Loan and Lease Losses
Extending Balloon Payments			1 year
Land Loan | Maximum [Member]
Loans and Leases and the Allowance for Loan and Lease Losses
Period of Time Loan Being Fully Amortized			360 months
Extending Balloon Payments			3 years
Commercial
Loans Modified as a TDR
Number of Contracts	19	0	38	1
Recorded Investment (as of period end)	3,271,000	0	11,314,000	953,000
Increase in Allowance (as of period end)	1,000	0	621,000	0
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date
Number of Contracts			1	0
Recorded Investment (as of period end)			492,000	0
Commercial and Industrial
Loans Modified as a TDR
Number of Contracts	18	0	33	0
Recorded Investment (as of period end)	2,207,000	0	4,774,000	0
Increase in Allowance (as of period end)	1,000	0	621,000	0
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date
Number of Contracts			1	0
Recorded Investment (as of period end)			492,000	0
Commercial Mortgage
Loans Modified as a TDR
Number of Contracts			4	0
Recorded Investment (as of period end)			5,476,000	0
Increase in Allowance (as of period end)			0	0
Construction
Loans Modified as a TDR
Number of Contracts	1	0	1	1
Recorded Investment (as of period end)	1,064,000	0	1,064,000	953,000
Increase in Allowance (as of period end)	0	0	0	0
Consumer
Loans Modified as a TDR
Number of Contracts	36	66	130	157
Recorded Investment (as of period end)	1,960,000	3,392,000	7,176,000	8,622,000
Increase in Allowance (as of period end)	117,000	516,000	904,000	965,000
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date
Number of Contracts	3	3	9	8
Recorded Investment (as of period end)	25,000	6,000	89,000	734,000
Residential Mortgage
Loans Modified as a TDR
Number of Contracts	5	6	17	11
Recorded Investment (as of period end)	1,533,000	2,757,000	5,823,000	7,106,000
Increase in Allowance (as of period end)	107,000	513,000	880,000	957,000
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date
Number of Contracts			0	2
Recorded Investment (as of period end)			0	702,000
Residential Mortgage | Maximum [Member]
Loans and Leases and the Allowance for Loan and Lease Losses
Period of Time Loan Being Fully Amortized			40 years
Automobile
Loans Modified as a TDR
Number of Contracts	25	60	106	146
Recorded Investment (as of period end)	353,000	635,000	1,276,000	1,516,000
Increase in Allowance (as of period end)	5,000	3,000	19,000	8,000
TDRs that Defaulted During the Period, Within Twelve Months of their Modification Date
Number of Contracts	3	3	9	6
Recorded Investment (as of period end)	25,000	6,000	89,000	32,000
Other
Loans Modified as a TDR
Number of Contracts	6	0	7	0
Recorded Investment (as of period end)	74,000	0	77,000	0
Increase in Allowance (as of period end)	$ 5,000	$ 0	$ 5,000	$ 0