Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 69,691	$ 46,295	$ 64,664		$ 49,980
Available-for-Sale	397,559	366,139	374,335
Held-to-Maturity	317,480	302,024	296,522
Held-to-Maturity Securities, at Fair Value	324,009	308,566	302,567	$ 302,567
Federal Home Loan Bank and Federal Reserve Bank Stock	5,143	4,851	3,001
Net Loans	1,521,151	1,397,698	1,366,147
Deposits	2,082,051	1,902,948	1,935,356
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	24,414	19,421	19,654
Federal Home Loan Bank Term Advances	55,000	10,000	10,000
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	69,691	46,295	64,664
Available-for-Sale	397,559	366,139	374,335
Held-to-Maturity	317,480	302,024	296,522
Federal Home Loan Bank and Federal Reserve Bank Stock	5,143	4,851	3,001
Net Loans	1,521,151	1,397,698	1,366,147
Accrued Interest Receivable	6,949	5,834	6,629
Deposits	2,082,051	1,902,948	1,935,356
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	24,414	19,421	19,654
Federal Home Loan Bank Term Advances	55,000	51,000	10,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	306	274	357
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	69,691	46,295	64,664
Available-for-Sale	397,559	366,139	374,335
Held-to-Maturity Securities, at Fair Value	324,009	308,566	302,567
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	5,143	4,851	3,001
Net Loans, Fair Value Disclosure	1,530,930	1,405,454	1,371,368
Accrued Interest Receivable, Fair Value Disclosure	6,949	5,834	6,629
Deposits, Fair Value Disclosure	2,076,658	1,899,682	1,929,377
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	24,414	19,421	19,654
Federal Home Loan Bank Term Advances, Fair Value Disclosure	56,630	51,258	10,340
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	306	274	357
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	69,691	46,295	64,664
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	5,143	4,851	3,001
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	6,949	5,834	6,629
Deposits, Fair Value Disclosure	1,887,237	1,697,105	1,709,155
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	24,414	19,421	19,654
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	41,000	10,340
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	306	274	357
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	397,559	366,139	374,335
Held-to-Maturity Securities, at Fair Value	324,009	308,566	302,567
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	189,421	202,577	220,222
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	56,630	10,258	0
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	1,530,930	1,405,454	1,371,368
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