Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 45,137	$ 46,295		$ 51,810	$ 49,980
Available-for-Sale	391,817	366,139	$ 366,848	366,848
Held-to-Maturity	324,116	302,024	297,437	297,437
Held-to-Maturity Securities, at Fair Value	328,361	308,566		304,259
Federal Home Loan Bank and Federal Reserve Bank Stock	6,470	4,851	4,583
Net Loans	1,464,096	1,397,698	1,329,088
Deposits	1,972,484	1,902,948	1,860,666
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	24,273	19,421	16,896
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	45,137	46,295		51,810
Available-for-Sale	391,817	366,139		366,848
Held-to-Maturity	324,116	302,024		297,437
Federal Home Loan Bank and Federal Reserve Bank Stock	6,470	4,851		4,583
Net Loans	1,464,096	1,397,698		1,329,088
Accrued Interest Receivable	6,007	5,834		5,849
Deposits	1,972,484	1,902,948		1,860,666
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	15,895	19,421		16,896
Federal Home Loan Bank Term Advances	50,000	51,000		34,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000		20,000
Accrued Interest Payable	289	274		365
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	45,137	46,295		51,810
Available-for-Sale	391,817	366,139		366,848
Held-to-Maturity Securities, at Fair Value	328,361	308,566		304,259
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	6,470	4,851		4,583
Net Loans, Fair Value Disclosure	1,469,427	1,405,454		1,342,104
Accrued Interest Receivable, Fair Value Disclosure	6,007	5,834		5,849
Deposits, Fair Value Disclosure	1,966,671	1,899,682		1,856,131
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	15,895	19,421		16,896
Federal Home Loan Bank Term Advances, Fair Value Disclosure	84,900	51,258		34,427
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000		20,000
Accrued Interest Payable, Fair Value Disclosure	289	274		365
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	45,137	46,295		51,810
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	6,470	4,851		4,583
Net Loans, Fair Value Disclosure	0	0		0
Accrued Interest Receivable, Fair Value Disclosure	6,007	5,834		5,849
Deposits, Fair Value Disclosure	1,777,645	1,697,105		1,630,950
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	15,895	19,421		16,896
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	41,000		24,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0		0
Accrued Interest Payable, Fair Value Disclosure	289	274		365
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	391,817	366,139		366,848
Held-to-Maturity Securities, at Fair Value	328,361	308,566		304,259
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	189,026	202,577		225,181
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	84,900	10,258		10,427
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	1,469,427	1,405,454		1,342,104
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