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Fair Value of Financial Instruments Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and Cash Equivalents | $ 100,272 | $ 72,838 | $ 64,803 | $ 57,355
Available-for-Sale | 305,589 | 300,200 | 347,159 |
Held-to-Maturity at Amortized Cost | 330,124 | 335,907 | 335,211 |
Held-To-Maturity Securities, at Fair Value | 324,938 | 335,901 | 335,105 |
Equity Securities | 1,579 | 0 | 0 |
Federal Home Loan Bank and Federal Reserve Bank Stock | 4,780 | 9,949 | 6,826 |
Net Loans | 1,973,980 | 1,932,184 | 1,793,589 |
Deposits | 2,411,273 | 2,245,116 | 2,256,536 |
Federal Funds Purchased and Securities Sold Under Agreements to Repurchase | 74,957 | 64,966 | 32,035 |
Federal Home Loan Bank Overnight Advances | 0 | 105,000 | 32,000 |
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 |
Carrying Amount |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and Cash Equivalents | 100,272 |  | 64,803 |
Net Loans | 1,973,980 | 1,932,184 | 1,793,589 |
Accrued Interest Receivable | 7,662 | 6,753 | 7,530 |
Deposits | 2,411,273 | 2,245,116 | 2,256,536 |
Accrued Interest Payable | 361 | 410 | 240 |
Fair Value |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Cash and Cash Equivalents, Fair Value Disclosure | 100,272 | 72,838 | 64,803 |
Available-for-Sale | 305,589 | 300,200 | 347,159 |
Held-To-Maturity Securities, at Fair Value | 324,938 | 335,901 | 335,105 |
Equity Securities | 1,579 |  |  |
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure | 4,780 | 9,949 | 6,826 |
Net Loans, Fair Value Disclosure | 1,915,978 | 1,901,046 | 1,773,895 |
Accrued Interest Receivable, Fair Value Disclosure | 7,662 | 6,753 | 7,530 |
Deposits, Fair Value Disclosure | 2,402,122 | 2,236,548 | 2,248,066 |
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure | 74,957 | 64,966 | 32,035 |
Federal Funds Purchased, Fair Value Disclosure |  | 105,000 | 32,000 |
Federal Home Loan Bank Term Advances, Fair Value Disclosure | 44,484 | 54,781 | 55,130 |
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure | 20,000 | 20,000 | 20,000 |
Accrued Interest Payable, Fair Value Disclosure | 361 | 410 | 240 |
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 | 100,272 | 72,838 | 64,803 |
Available-for-Sale | 0 | 59,894 | 54,695 |
Held-To-Maturity Securities, at Fair Value | 0 | 0 | 0 |
Equity Securities | 0 |  |  |
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 | 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 |
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 | 305,589 | 240,306 | 292,464 |
Held-To-Maturity Securities, at Fair Value | 324,938 | 335,901 | 335,105 |
Equity Securities | 1,579 |  |  |
Federal Home Loan Bank and Federal Reserve Bank Stock, Fair Value Disclosure | 4,780 | 9,949 | 6,826 |
Net Loans, Fair Value Disclosure | 0 | 0 | 0 |
Accrued Interest Receivable, Fair Value Disclosure | 7,662 | 6,753 | 7,530 |
Deposits, Fair Value Disclosure | 2,402,122 | 2,236,548 | 2,248,066 |
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Fair Value Disclosure | 74,957 | 64,966 | 32,035 |
Federal Funds Purchased, Fair Value Disclosure |  | 105,000 | 32,000 |
Federal Home Loan Bank Term Advances, Fair Value Disclosure | 44,484 | 54,781 | 55,130 |
Junior Subordinated Obligations Issued to Unconsolidated Subsidiary Trusts, Fair Value Disclosure | 20,000 | 20,000 | 20,000 |
Accrued Interest Payable, Fair Value Disclosure | 361 | 410 | 240 |
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 | 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 Disclosure | 0 | 0 | 0 |
Net Loans, Fair Value Disclosure | 1,915,978 | 1,901,046 | 1,773,895 |
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 |
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 |

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64702-112823 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition Amount of interest payable on debt, including, but not limited to, trade payables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Fair value portion of securities that an entity sells and agrees to repurchase at a specified date for a specified price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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