Fair Value of Assets and Liabilities - Off-Balance Sheet Credit-Related Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Carrying amount
Financial Assets
Cash and cash equivalents	$ 95,751	$ 144,006
Loans	2,027,082	1,697,355
Accrued interest receivable	9,199	7,551
Bank-owned life insurance	32,161	31,566
Financial Liabilities
Noninterest-bearing deposits	693,450	577,704
Interest-bearing deposits	1,561,498	1,197,530
Time deposits	207,422	196,082
Long-term debt	58,745	58,769
Accrued interest payable	1,408	1,038
Estimated fair value
Financial Assets
Cash and cash equivalents	95,751	144,006
Loans	2,075,044	1,693,824
Accrued interest receivable	9,199	7,551
Bank-owned life insurance	32,161	31,566
Financial Liabilities
Noninterest-bearing deposits	693,450	577,704
Interest-bearing deposits	1,561,498	1,197,530
Time deposits	208,990	196,182
Long-term debt	56,219	58,239
Accrued interest payable	1,408	1,038
Level 1 | Estimated fair value
Financial Assets
Cash and cash equivalents	95,751	144,006
Accrued interest receivable	9,199	7,551
Financial Liabilities
Accrued interest payable	1,408	1,038
Level 2 | Estimated fair value
Financial Assets
Bank-owned life insurance	32,161	31,566
Financial Liabilities
Noninterest-bearing deposits	693,450	577,704
Interest-bearing deposits	1,561,498	1,197,530
Long-term debt	56,219	58,239
Level 3 | Estimated fair value
Financial Assets
Loans	2,075,044	1,693,824
Financial Liabilities
Time deposits	$ 208,990	$ 196,182