Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
TOTAL NONINTEREST INCOME	$ 6,994	$ 6,306	$ 13,514	$ 12,316
Service Charges on Deposit Accounts
Disaggregation Of Revenue [Line Items]
Noninterest income	1,093	985	2,167	1,988
Debit Card and EFT Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	887	870	1,665	1,676
Trust Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	1,821	1,740	3,679	3,547
Insurance Agency Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	739	713	1,542	1,412
Retirement Plan Consulting Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	450	465	808	844
Investment Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	327	315	587	571
Operating Segments
Disaggregation Of Revenue [Line Items]
TOTAL NONINTEREST INCOME	6,994	6,306	13,514	12,316
Operating Segments | Service Charges on Deposit Accounts
Disaggregation Of Revenue [Line Items]
Noninterest income	1,093	985	2,167	1,988
Operating Segments | Debit Card and EFT Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	887	870	1,665	1,676
Operating Segments | Trust Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	1,821	1,740	3,679	3,547
Operating Segments | Insurance Agency Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	739	713	1,542	1,412
Operating Segments | Retirement Plan Consulting Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	450	465	808	844
Operating Segments | Investment Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	327	315	587	571
Operating Segments | Other
Disaggregation Of Revenue [Line Items]
Noninterest income	1,677	1,218	3,066	2,278
Operating Segments | Trust Segment
Disaggregation Of Revenue [Line Items]
TOTAL NONINTEREST INCOME	1,821	1,740	3,679	3,547
Operating Segments | Trust Segment | Service Charges on Deposit Accounts
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Trust Segment | Debit Card and EFT Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Trust Segment | Trust Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	1,821	1,740	3,679	3,547
Operating Segments | Trust Segment | Insurance Agency Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Trust Segment | Retirement Plan Consulting Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Trust Segment | Investment Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Trust Segment | Other
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Bank Segment
Disaggregation Of Revenue [Line Items]
TOTAL NONINTEREST INCOME	4,723	4,101	9,027	7,925
Operating Segments | Bank Segment | Service Charges on Deposit Accounts
Disaggregation Of Revenue [Line Items]
Noninterest income	1,093	985	2,167	1,988
Operating Segments | Bank Segment | Debit Card and EFT Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	887	870	1,665	1,676
Operating Segments | Bank Segment | Trust Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Bank Segment | Insurance Agency Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	739	713	1,542	1,412
Operating Segments | Bank Segment | Retirement Plan Consulting Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Bank Segment | Investment Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	327	315	587	571
Operating Segments | Bank Segment | Other
Disaggregation Of Revenue [Line Items]
Noninterest income	1,677	1,218	3,066	2,278
Operating Segments | Retirement Consulting Segment
Disaggregation Of Revenue [Line Items]
TOTAL NONINTEREST INCOME	450	465	808	844
Operating Segments | Retirement Consulting Segment | Service Charges on Deposit Accounts
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Retirement Consulting Segment | Debit Card and EFT Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Retirement Consulting Segment | Trust Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Retirement Consulting Segment | Insurance Agency Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Retirement Consulting Segment | Retirement Plan Consulting Fees
Disaggregation Of Revenue [Line Items]
Noninterest income	450	465	808	844
Operating Segments | Retirement Consulting Segment | Investment Commissions
Disaggregation Of Revenue [Line Items]
Noninterest income	0	0	0	0
Operating Segments | Retirement Consulting Segment | Other
Disaggregation Of Revenue [Line Items]
Noninterest income	$ 0	$ 0	$ 0	$ 0