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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Disaggregation Of Revenue [Line Items] |  |  |
Service charges on deposit accounts |  | $ 1,003 | $ 951
Debit card and EFT fees |  | 806 | 653
Trust fees |  | 1,807 | 1,678
Insurance agency commissions |  | 699 | 674
Retirement plan consulting fees |  | 379 | 513
Investment commissions |  | 256 | 222
Other | [1] | 1,060 | 1,196
TOTAL NONINTEREST INCOME |  | 6,010 | 5,887
Trust Segment | Operating Segments |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Service charges on deposit accounts |  | 0 | 0
Debit card and EFT fees |  | 0 | 0
Trust fees |  | 1,807 | 1,678
Insurance agency commissions |  | 0 | 0
Retirement plan consulting fees |  | 0 | 0
Investment commissions |  | 0 | 0
Other | [1] | 0 | 0
TOTAL NONINTEREST INCOME |  | 1,807 | 1,678
Bank Segment | Operating Segments |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Service charges on deposit accounts |  | 1,003 | 951
Debit card and EFT fees |  | 806 | 653
Trust fees |  | 0 | 0
Insurance agency commissions |  | 699 | 674
Retirement plan consulting fees |  | 0 | 0
Investment commissions |  | 256 | 222
Other | [1] | 1,060 | 1,196
TOTAL NONINTEREST INCOME |  | 3,824 | 3,696
Retirement Consulting Segment | Operating Segments |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Service charges on deposit accounts |  | 0 | 0
Debit card and EFT fees |  | 0 | 0
Trust fees |  | 0 | 0
Insurance agency commissions |  | 0 | 0
Retirement plan consulting fees |  | 379 | 513
Investment commissions |  | 0 | 0
Other | [1] | 0 | 0
TOTAL NONINTEREST INCOME |  | $ 379 | $ 513
[1] | Not within the scope of ASC 606.

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- Definition Retirement plan consulting fees. + References No definition available. + Details
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- Definition Amount of commission revenue from buying and selling securities on behalf of customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 05 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68070981&loc=d3e40544-110947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(a),(b)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of income earned from debit card services, including interchange fees, annual fees and other fees. + References No definition available. + Details
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- Definition Includes amounts charged depositors for: (1) maintenance of their accounts (maintenance charges); (2) failure to maintain specified minimum balances on account; (3) exceeding the number of checks or transactions allowed to be processed in a given period; (4) checks drawn on no minimum balance deposit accounts; (5) withdrawals from nontransaction deposit accounts; (6) closing savings accounts before a specified minimum period of time has elapsed; (7) accounts which have remained inactive for extended periods of time or which have become dormant; (8) use of automated teller machines or remote service units; (9) checks drawn against insufficient funds that the bank assesses regardless of whether it decides to pay, return or hold the check; (10) issuing stop payment orders; (11) certifying checks; and (12) accumulating or disbursing funds deposited in IRAs or Keogh Plan accounts when not handled by the bank's trust department. This item does not include penalties assessed on the early withdrawal of time deposits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Income from services rendered by trust departments or by any consolidated subsidiaries acting in a fiduciary capacity, including fees earned for (1) acting as an agent for fiduciary placement and loans and (2) custody or investment advisory services when such fees are not separately billed to the customer. This item excludes commissions and fees received for the accumulation or disbursement of funds deposited to Individual Retirement or Keogh plan accounts when such are not handled by the reporting entity's trust department. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13 (a)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.4) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(c),(d)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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