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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation Of Revenue [Line Items] |  |  |  |
TOTAL NONINTEREST INCOME | $ 6,478 | $ 6,058 | $ 18,794 | $ 18,000
Service Charges on Deposit Accounts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,151 | 1,077 | 3,139 | 3,017
Debit Card and EFT Fees |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 814 | 770 | 2,490 | 2,259
Trust Fees |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,827 | 1,608 | 5,374 | 4,809
Insurance Agency Commissions |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 567 | 531 | 1,979 | 1,877
Retirement Plan Consulting Fees |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 470 | 480 | 1,314 | 1,392
Investment Commissions |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 273 | 184 | 844 | 659
Operating Segments |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
TOTAL NONINTEREST INCOME | 6,478 | 6,058 | 18,794 | 18,000
Operating Segments | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
TOTAL NONINTEREST INCOME | 1,827 | 1,608 | 5,374 | 4,809
Operating Segments | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
TOTAL NONINTEREST INCOME | 4,181 | 3,970 | 12,106 | 11,799
Operating Segments | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
TOTAL NONINTEREST INCOME | 470 | 480 | 1,314 | 1,392
Operating Segments | Service Charges on Deposit Accounts |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,151 | 1,077 | 3,139 | 3,017
Operating Segments | Service Charges on Deposit Accounts | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Service Charges on Deposit Accounts | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,151 | 1,077 | 3,139 | 3,017
Operating Segments | Service Charges on Deposit Accounts | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Debit Card and EFT Fees |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 814 | 770 | 2,490 | 2,259
Operating Segments | Debit Card and EFT Fees | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Debit Card and EFT Fees | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 814 | 770 | 2,490 | 2,259
Operating Segments | Debit Card and EFT Fees | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Trust Fees |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,827 | 1,608 | 5,374 | 4,809
Operating Segments | Trust Fees | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,827 | 1,608 | 5,374 | 4,809
Operating Segments | Trust Fees | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Trust Fees | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Insurance Agency Commissions |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 567 | 531 | 1,979 | 1,877
Operating Segments | Insurance Agency Commissions | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Insurance Agency Commissions | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 567 | 531 | 1,979 | 1,877
Operating Segments | Insurance Agency Commissions | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Retirement Plan Consulting Fees |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 470 | 480 | 1,314 | 1,392
Operating Segments | Retirement Plan Consulting Fees | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Retirement Plan Consulting Fees | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Retirement Plan Consulting Fees | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 470 | 480 | 1,314 | 1,392
Operating Segments | Investment Commissions |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 273 | 184 | 844 | 659
Operating Segments | Investment Commissions | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Investment Commissions | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 273 | 184 | 844 | 659
Operating Segments | Investment Commissions | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Other |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,376 | 1,408 | 3,654 | 3,987
Operating Segments | Other | Trust Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 0 | 0 | 0 | 0
Operating Segments | Other | Bank Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | 1,376 | 1,408 | 3,654 | 3,987
Operating Segments | Other | Retirement Consulting Segment |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Noninterest income | $ 0 | $ 0 | $ 0 | $ 0

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