Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	$ 92,295	$ 72,838	$ 80,666	$ 57,355
Available-for-Sale	340,411	300,200	315,459
Held-To-Maturity Securities, at Amortized Cost	289,952	335,907	341,526
Held-To-Maturity Securities, at Fair Value	282,719	335,901	343,899
Equity Securities	1,916	0	0
Net Loans	2,106,097	1,932,184	1,891,104
Deposits	2,407,855	2,245,116	2,307,116
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase		64,966	61,419
Federal Home Loan Bank Overnight Advances		105,000	33,000
Federal Home Loan Bank Term Advances		55,000	55,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts		20,000	20,000
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	92,295		80,666
Available-for-Sale	340,411
Securities Available-for-Sale		300,200	315,459
Held-To-Maturity Securities, at Amortized Cost	289,952	335,907	341,526
Equity Securities	1,916
Federal Home Loan Bank and Federal Reserve Bank Stock	10,866	9,949	6,704
Net Loans	2,106,097	1,932,184	1,891,104
Accrued Interest Receivable	8,028	6,753	6,563
Deposits	2,407,855	2,245,116	2,307,116
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase	62,503	64,966	61,419
Federal Home Loan Bank Overnight Advances	131,000	105,000	33,000
Federal Home Loan Bank Term Advances	45,000	55,000	55,000
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts	20,000	20,000	20,000
Accrued Interest Payable	485	410	260
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	92,295	72,838	80,666
Available-for-Sale	340,411
Securities Available-for-Sale		300,200	315,459
Held-To-Maturity Securities, at Fair Value	282,719	335,901	343,899
Equity Securities	1,916
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	10,866	9,949	6,704
Net Loans, at Fair Value	2,030,278	1,901,046	1,870,379
Accrued Interest Receivable, Fair Value Disclosure	8,028	6,753	7,692
Deposits, at Fair Value	2,398,987	2,236,548	2,299,011
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	62,503	64,966	61,419
Federal Home Loan Bank Overnight Advances, Fair Value Disclosure	131,000	105,000	33,000
Federal Home Loan Bank Term Advances, Fair Value Disclosure	44,488	54,781	55,110
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	485	410	260
Quoted Prices In Active Markets for Indentical Assets (Level 1) \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	92,295	72,838	80,666
Available-for-Sale	0
Securities Available-for-Sale		0	64,730
Held-To-Maturity Securities, at Fair Value	0	0	0
Equity Securities	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	0	0	0
Net Loans, at Fair Value	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, at Fair Value	0	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	0	0	0
Federal Home Loan Bank Overnight Advances, 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
Significant Other Observable Inputs (Level 2) \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0	0
Available-for-Sale	340,411
Securities Available-for-Sale		300,200	250,729
Held-To-Maturity Securities, at Fair Value	282,719	335,901	343,899
Equity Securities	1,916
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	10,866	9,949	6,704
Net Loans, at Fair Value	0	0	0
Accrued Interest Receivable, Fair Value Disclosure	8,028	6,753	7,692
Deposits, at Fair Value	2,398,987	2,236,548	2,299,011
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	62,503	64,966	61,419
Federal Home Loan Bank Overnight Advances, Fair Value Disclosure	131,000	105,000	33,000
Federal Home Loan Bank Term Advances, Fair Value Disclosure	44,488	54,781	55,110
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure	20,000	20,000	20,000
Accrued Interest Payable, Fair Value Disclosure	485	410	260
Significant Unobservable Inputs (Level 3) \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	0	0
Available-for-Sale	0
Securities Available-for-Sale		0	0
Held-To-Maturity Securities, at Fair Value	0	0	0
Equity Securities	0
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value	0	0	0
Net Loans, at Fair Value	2,030,278	1,901,046	1,870,379
Accrued Interest Receivable, Fair Value Disclosure	0	0	0
Deposits, at Fair Value	0	0	0
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, at Fair Value	0	0	0
Federal Home Loan Bank Overnight Advances, 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

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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Amount after offset of short term borrowing where a bank borrows, at the federal funds rate, from another bank and securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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Fair value portion of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

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Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of other assets.

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Fair value portion of other liabilities.

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Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price.

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