Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 60,711	$ 51,068	$ 111,595	$ 46,295
Available-for-Sale	388,247	402,309	393,133
Held-to-Maturity	315,284	320,611	305,175
Held-to-Maturity Securities, at Fair Value	324,337	325,930	312,500		$ 312,500
Federal Home Loan Bank and Federal Reserve Bank Stock	5,149	8,839	4,806
Net Loans	1,606,441	1,557,914	1,419,169
Deposits	2,115,061	2,030,423	2,018,704
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	45,155	23,173	15,895
Federal Home Loan Bank Term Advances	55,000	55,000	50,000
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		51,068	111,595
Available-for-Sale		402,309	393,133
Held-to-Maturity		320,611	305,175
Federal Home Loan Bank and Federal Reserve Bank Stock		8,839	4,806
Net Loans	1,606,441	1,557,914	1,419,169
Accrued Interest Receivable	7,156	6,360	6,698
Deposits	2,115,061	2,030,423	2,018,704
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase		23,173	15,895
Federal Home Loan Bank Term Advances		137,000	50,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts		20,000	20,000
Accrued Interest Payable	227	231	289
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	60,711	51,068	111,595
Available-for-Sale	388,247	402,309	393,133
Held-to-Maturity Securities, at Fair Value	324,337	325,930	312,500
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	5,149	8,839	4,806
Net Loans, Fair Value Disclosure	1,613,221	1,557,511	1,429,553
Accrued Interest Receivable, Fair Value Disclosure	7,156	6,360	6,698
Deposits, Fair Value Disclosure	2,109,546	2,024,224	2,016,098
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	45,155	19,421	15,895
Federal Home Loan Bank Term Advances, Fair Value Disclosure	55,930	137,063	50,851
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	227	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	60,711	51,068	111,595
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	5,149	8,839	4,806
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	7,156	6,360	6,698
Deposits, Fair Value Disclosure	1,925,905	1,840,606	1,820,165
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	45,155	19,421	15,895
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	82,000	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	227	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	388,247	402,309	393,133
Held-to-Maturity Securities, at Fair Value	324,337	325,930	312,500
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	183,641	183,618	195,933
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	0	0	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	55,930	55,063	50,851
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	1,613,221	1,557,511	1,429,553
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 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