Fair Values Fair Value By Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 57,355	$ 51,068	$ 46,295	$ 49,980
Available-for-Sale	346,996	402,309
Held-to-Maturity (Approximate Fair Value of $343,751 at December 31, 2016, and $325,930 at December 31, 2015)	345,427	320,611
Held-To-Maturity Securities, at Fair Value	343,751	325,930
Other Investments	10,912	8,839
Net Loans	1,736,256	1,557,914
Deposits	2,116,546	2,030,423
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	35,836	23,173
Federal Home Loan Bank Overnight Advances	123,000	82,000
Federal Home Loan Bank Term Advances	55,000	55,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	57,355	51,068
Available-for-Sale	346,996	402,309
Held-to-Maturity (Approximate Fair Value of $343,751 at December 31, 2016, and $325,930 at December 31, 2015)	345,427	320,611
Other Investments	10,912	8,839
Net Loans	1,736,256	1,557,914
Accrued Interest Receivable	6,684	6,360
Deposits	2,116,546	2,030,423
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase		23,173
Federal Home Loan Bank Overnight Advances		82,000
Federal Home Loan Bank Term Advances		55,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts		20,000
Accrued Interest Payable	247	231
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	57,355	51,068
Available-for-Sale	346,996	402,309
Held-To-Maturity Securities, at Fair Value	343,751	325,930
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	10,912	8,839
Net Loans, Fair Value Disclosure	1,720,078	1,557,511
Accrued Interest Receivable, Fair Value Disclosure	6,684	6,360
Deposits, Fair Value Disclosure	2,109,557	2,024,224
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure		19,421
Federal Home Loan Bank Overnight Advances		82,000
Federal Home Loan Bank Term Advances, Fair Value Disclosure	55,118	55,063
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	247	231
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	57,355	51,068
Available-for-Sale	54,706	0
Held-To-Maturity Securities, at Fair Value	0	0
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	10,912	8,839
Net Loans, Fair Value Disclosure	0	0
Accrued Interest Receivable, Fair Value Disclosure	6,684	6,360
Deposits, Fair Value Disclosure	1,917,233	1,840,606
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	35,836	19,421
Federal Home Loan Bank Overnight Advances	123,000	82,000
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0
Accrued Interest Payable, Fair Value Disclosure	247	231
Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-Sale	292,290	402,309
Held-To-Maturity Securities, at Fair Value	343,751	325,930
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	0	0
Net Loans, Fair Value Disclosure	0	0
Accrued Interest Receivable, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	192,324	183,618
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Overnight Advances	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	55,118	55,063
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Available-for-Sale	0	0
Held-To-Maturity Securities, at Fair Value	0	0
Federal Home Loan Bank Stock and Federal Reserve Bank Stock, Fair Value Disclosure	0	0
Net Loans, Fair Value Disclosure	1,720,078	1,557,511
Accrued Interest Receivable, Fair Value Disclosure	0	0
Deposits, Fair Value Disclosure	0	0
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase, Fair Value Disclosure	0	0
Federal Home Loan Bank Overnight Advances	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0
Accrued Interest Payable, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-Sale	346,996	402,309
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-Sale	54,706	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-Sale	292,290	402,309
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-Sale	$ 0	$ 0