Fair Value of Financial Instruments - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets:
Cash and due from banks	$ 16,676	$ 22,576
Federal funds sold and overnight interest-bearing deposits	58,619	55,545
Certificates of deposit in other banks	11,106	10,862
Available for sale securities	198,049	175,093
Loans held for sale	4,286	428
Mortgage servicing rights	2,274	2,482
Accrued interest receivable	6,263	6,481
Deposits:
Non-interest bearing demand	272,578	261,166
Savings, interest checking and money market	596,294	614,331
Operating lease liabilities	2,162	2,224
Accrued interest payable	780	1,136
Carrying Amount
Assets:
Cash and due from banks	16,676	22,576
Federal funds sold and overnight interest-bearing deposits	58,619	55,545
Certificates of deposit in other banks	11,106	10,862
Available for sale securities	198,049	175,093
Other investment securities	7,296	5,808
Loans, net	1,164,829	1,156,320
Loans held for sale	4,286	428
Cash surrender value - life insurance	2,411	2,398
Accrued interest receivable	6,263	6,481
Assets, Total	1,469,535	1,435,511
Deposits:
Non-interest bearing demand	272,578	261,166
Savings, interest checking and money market	596,294	614,331
Time deposits	310,699	311,024
Federal funds purchased and securities sold under agreements to repurchase	30,764	27,272
Federal Home Loan Bank advances and other borrowings	133,861	96,919
Subordinated notes	49,486	49,486
Operating lease liabilities	2,162	2,224
Accrued interest payable	780	1,136
Liabilities, Total	1,396,624	1,363,558
Total Fair Value
Assets:
Cash and due from banks	16,676	22,576
Federal funds sold and overnight interest-bearing deposits	58,619	55,545
Certificates of deposit in other banks	11,106	10,862
Available for sale securities	198,049	175,093
Other investment securities	7,296	5,808
Loans, net	1,180,815	1,148,339
Loans held for sale	4,322	435
Cash surrender value - life insurance	2,411	2,398
Accrued interest receivable	6,263	6,481
Assets, Total	1,485,557	1,427,537
Deposits:
Non-interest bearing demand	272,578	261,166
Savings, interest checking and money market	596,294	614,331
Time deposits	313,690	311,489
Federal funds purchased and securities sold under agreements to repurchase	30,764	27,272
Federal Home Loan Bank advances and other borrowings	136,395	97,833
Subordinated notes	40,800	43,640
Operating lease liabilities	2,162	2,224
Accrued interest payable	780	1,136
Liabilities, Total	1,393,463	1,359,091
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and due from banks	16,676	22,576
Federal funds sold and overnight interest-bearing deposits	58,619	55,545
Certificates of deposit in other banks	11,106	10,862
Available for sale securities	777	995
Other investment securities	12	13
Loans, net	0	0
Loans held for sale	0	0
Cash surrender value - life insurance	0	0
Accrued interest receivable	6,263	6,481
Assets, Total	93,453	96,472
Deposits:
Non-interest bearing demand	272,578	261,166
Savings, interest checking and money market	596,294	614,331
Time deposits	0	0
Federal funds purchased and securities sold under agreements to repurchase	30,764	27,272
Federal Home Loan Bank advances and other borrowings	0	0
Subordinated notes	0	0
Operating lease liabilities	0	0
Accrued interest payable	780	1,136
Liabilities, Total	900,416	903,905
Other Observable Inputs (Level 2)
Assets:
Cash and due from banks	0	0
Federal funds sold and overnight interest-bearing deposits	0	0
Certificates of deposit in other banks	0	0
Available for sale securities	197,272	174,098
Other investment securities	7,284	5,795
Loans, net	0	0
Loans held for sale	0	0
Cash surrender value - life insurance	2,411	2,398
Accrued interest receivable	0	0
Assets, Total	206,967	182,291
Deposits:
Non-interest bearing demand	0	0
Savings, interest checking and money market	0	0
Time deposits	0	0
Federal funds purchased and securities sold under agreements to repurchase	0	0
Federal Home Loan Bank advances and other borrowings	136,395	97,833
Subordinated notes	40,800	43,640
Operating lease liabilities	2,162	2,224
Accrued interest payable	0	0
Liabilities, Total	179,357	143,697
Significant Unobservable Inputs (Level 3)
Assets:
Cash and due from banks	0	0
Federal funds sold and overnight interest-bearing deposits	0	0
Certificates of deposit in other banks	0	0
Available for sale securities	0	0
Other investment securities	0	0
Loans, net	1,180,815	1,148,339
Loans held for sale	4,322	435
Cash surrender value - life insurance	0	0
Accrued interest receivable	0	0
Assets, Total	1,185,137	1,148,774
Deposits:
Non-interest bearing demand	0	0
Savings, interest checking and money market	0	0
Time deposits	313,690	311,489
Federal funds purchased and securities sold under agreements to repurchase	0	0
Federal Home Loan Bank advances and other borrowings	0	0
Subordinated notes	0	0
Operating lease liabilities	0	0
Accrued interest payable	0	0
Liabilities, Total	$ 313,690	$ 311,489