Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 76,050	$ 49,980	$ 137,174	$ 48,832
Available-for-Sale	429,230	457,606	478,775
Held-to-Maturity	317,632	299,261	251,456
Held-to-Maturity Securities, at Fair Value	322,335	302,305	259,562
Federal Home Loan Bank and Federal Reserve Bank Stock	3,896	6,281	4,493
Net Loans	1,295,787	1,252,038	1,150,156
Deposits	1,948,019	1,842,330	1,851,206
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	13,787	11,777	12,166
Federal Home Loan Bank Term Advances	20,000	20,000	30,000
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	76,050	49,980	137,174
Available-for-Sale	429,230	457,606	478,775
Held-to-Maturity	317,632	299,261	251,456
Federal Home Loan Bank and Federal Reserve Bank Stock	3,896	6,281	4,493
Net Loans	1,295,787	1,252,038	1,150,156
Accrued Interest Receivable	6,808	5,745	6,481
Deposits	1,948,019	1,842,330	1,851,206
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	13,787	11,777	12,166
Federal Home Loan Bank Term Advances	20,000	73,000	30,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	405	439	523
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	76,050	49,980	137,174
Available-for-Sale	429,230	457,606	478,775
Held-to-Maturity Securities, at Fair Value	322,335	302,305	259,562
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	3,896	6,281	4,493
Net Loans, Fair Value Disclosure	1,306,043	1,266,020	1,167,063
Accrued Interest Receivable, Fair Value Disclosure	6,808	5,745	6,481
Deposits, Fair Value Disclosure	1,944,116	1,839,613	1,850,614
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	13,787	11,777	12,166
Federal Home Loan Bank Term Advances, Fair Value Disclosure	20,519	74,629	31,263
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	405	439	523
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	76,050	49,980	137,174
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	3,896	6,281	4,493
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	6,808	5,745	6,481
Deposits, Fair Value Disclosure	1,709,784	1,595,103	1,575,954
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	13,787	11,777	12,166
Federal Home Loan Bank Term Advances, Fair Value Disclosure	0	53,000	0
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	0	0	0
Accrued Interest Payable, Fair Value Disclosure	405	439	523
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	429,230	457,606	478,775
Held-to-Maturity Securities, at Fair Value	322,335	302,305	259,562
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	234,332	244,510	274,660
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	20,519	21,629	31,263
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	1,306,043	1,266,020	1,167,063
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