Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 102,059	$ 51,068	$ 69,691	$ 46,295
Available-for-Sale	339,190	402,309	397,559
Held-to-Maturity	338,238	320,611	317,480
Held-to-Maturity Securities, at Fair Value	347,441	325,930	324,009
Federal Home Loan Bank and Federal Reserve Bank Stock	5,371	8,839	5,143
Net Loans	1,690,241	1,557,914	1,521,151
Deposits	2,213,187	2,030,423	2,082,051
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	38,589	23,173	24,414
Federal Home Loan Bank Overnight Advances	0	82,000	0
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	102,059		69,691
Net Loans	1,690,241	1,557,914	1,521,151
Accrued Interest Receivable	7,046	6,360	6,949
Deposits	2,213,187	2,030,423	2,082,051
Accrued Interest Payable	247	231	306
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	102,059	51,068	69,691
Available-for-Sale	339,190	402,309	397,559
Held-to-Maturity Securities, at Fair Value	347,441	325,930	324,009
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure	5,371	8,839	5,143
Net Loans, Fair Value Disclosure	1,696,929	1,557,511	1,530,930
Accrued Interest Receivable, Fair Value Disclosure	7,046	6,360	6,949
Deposits, Fair Value Disclosure	2,207,985	2,024,224	2,076,658
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	38,589	19,421	24,414
Federal Funds Purchased, Fair Value Disclosure	0	82,000	0
Federal Home Loan Bank Term Advances, Fair Value Disclosure	55,955	55,063	56,630
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	247	231	306
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	102,059	51,068	69,691
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	5,371	8,839	5,143
Net Loans, Fair Value Disclosure	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	7,046	6,360	6,949
Deposits, Fair Value Disclosure	2,004,182	1,840,606	1,887,237
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure	38,589	19,421	24,414
Federal Funds Purchased, Fair Value Disclosure	0	82,000	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	247	231	306
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	339,190	402,309	397,559
Held-to-Maturity Securities, at Fair Value	347,441	325,930	324,009
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	203,803	183,618	189,421
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	55,955	55,063	56,630
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	1,696,929	1,557,511	1,530,930
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