Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents		$ 51,068	$ 45,137	$ 46,295
Available-for-Sale	$ 362,929	402,309	391,817
Held-to-Maturity	343,814	320,611	324,116
Held-to-Maturity Securities, at Fair Value	354,778	325,930	328,361		$ 328,361
Federal Home Loan Bank and Federal Reserve Bank Stock	9,961	8,839	6,470
Net Loans	1,655,692	1,557,914	1,464,096
Deposits	2,072,385	2,030,423	1,972,484
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	41,497	23,173	24,273
Federal Home Loan Bank Overnight Advances	102,000	82,000	29,500
Federal Home Loan Bank Term Advances	55,000	55,000	55,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	63,115	51,068	45,137
Available-for-Sale		402,309	391,817
Held-to-Maturity		320,611	324,116
Federal Home Loan Bank and Federal Reserve Bank Stock		8,839	6,470
Net Loans	1,655,692	1,557,914	1,464,096
Accrued Interest Receivable	6,383	6,360	6,007
Deposits	2,072,385	2,030,423	1,972,484
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase		23,173	15,895
Federal Home Loan Bank Overnight Advances			29,500
Accrued Interest Payable	231	231	289
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	63,115	51,068	45,137
Available-for-Sale	362,929	402,309	391,817
Held-to-Maturity Securities, at Fair Value	354,778	325,930	328,361
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	9,961	8,839	6,470
Net Loans, Fair Value Disclosure	1,664,713	1,557,511	1,469,427
Accrued Interest Receivable, Fair Value Disclosure	6,383	6,360	6,007
Deposits, Fair Value Disclosure	2,067,328	2,024,224	1,966,671
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	41,497	19,421	15,895
Federal Funds Purchased, Fair Value Disclosure	102,000	82,000	29,500
Federal Home Loan Bank Term Advances, Fair Value Disclosure	56,145	55,063	55,400
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	231	231	289
Quoted Prices In Active Markets for Indentical Assets (Level 1) [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	63,115	51,068	45,137
Available-for-Sale	0	0	0
Held-to-Maturity Securities, at Fair Value	0	0	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	9,961	8,839	6,470
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	6,383	6,360	6,007
Deposits, Fair Value Disclosure	1,869,865	1,840,606	1,777,645
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	41,497	19,421	15,895
Federal Funds Purchased, Fair Value Disclosure	102,000	82,000	29,500
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	231	231	289
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	0
Available-for-Sale	362,929	402,309	391,817
Held-to-Maturity Securities, at Fair Value	354,778	325,930	328,361
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	0	0	0
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, Fair Value Disclosure	197,463	183,618	189,026
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	0	0	0
Federal Funds Purchased, Fair Value Disclosure	0	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	56,145	55,063	55,400
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	0	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	0
Available-for-Sale	0	0	0
Held-to-Maturity Securities, at Fair Value	0	0	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	0	0	0
Net Loans, Fair Value Disclosure	1,664,713	1,557,511	1,469,427
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, Fair Value Disclosure	0	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	0	0	0
Federal Funds Purchased, Fair Value Disclosure	0	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	0	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	$ 0	$ 0	$ 0