Loans, Allowance for Loan and Lease Losses, and Reserve for Off-Balance Sheet Credit Commitments (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012 item
Financing Receivable, Impaired
Impaired loans on accrual status	$ 42,100,000	$ 48,800,000
TDR loans	52,200,000	94,900,000
Specific Reserves	800,000	1,700,000
Total Troubled Debt Restructured Loans
Financing Receivable, Impaired
Number of Contracts	18	31
Pre-Modification Outstanding Principal	19,170,000	79,970,000
Period-End Outstanding Principal	10,470,000	49,723,000
Financial Effects	344,000	11,277,000
Commercial
Financing Receivable, Impaired
Number of Contracts	14	20
Pre-Modification Outstanding Principal	17,615,000	38,371,000
Period-End Outstanding Principal	9,302,000	19,671,000
Financial Effects	344,000	10,528,000
Commercial real estate mortgages
Financing Receivable, Impaired
Number of Contracts	1	2
Pre-Modification Outstanding Principal	547,000	15,833,000
Period-End Outstanding Principal	524,000	16,287,000
Fixed
Financing Receivable, Impaired
Number of Contracts	1	4
Pre-Modification Outstanding Principal	639,000	2,233,000
Period-End Outstanding Principal	628,000	1,068,000
Financial Effects		485,000
Home equity loans and lines of credit
Financing Receivable, Impaired
Number of Contracts	1	1
Pre-Modification Outstanding Principal	345,000	256,000
Period-End Outstanding Principal		146,000
Real estate construction
Financing Receivable, Impaired
Number of Contracts		4
Pre-Modification Outstanding Principal		23,277,000
Period-End Outstanding Principal		12,551,000
Financial Effects		264,000
Construction
Financing Receivable, Impaired
Number of Contracts		3
Pre-Modification Outstanding Principal		14,857,000
Period-End Outstanding Principal		4,633,000
Land
Financing Receivable, Impaired
Number of Contracts		1
Pre-Modification Outstanding Principal		8,420,000
Period-End Outstanding Principal		7,918,000
Financial Effects		264,000
Consumer Installment loan
Financing Receivable, Impaired
Number of Contracts	1
Pre-Modification Outstanding Principal	24,000
Period-End Outstanding Principal	$ 16,000