Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial assets:
Securities AFS	$ 659,178	$ 498,206
Equity securities	7,846	4,021
Nonmarketable equity securities	3,450	3,447
Level 1
Financial assets:
Cash and due from banks	23,143	29,537
Interest-bearing deposits in other banks	761,721	417,664
Securities AFS	0	0
Equity securities	7,846	4,021
Nonmarketable equity securities	0	0
Loans HFS	0	0
Loans HFI, net of allowance	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
Level 2
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits in other banks	0	0
Securities AFS	659,178	498,206
Equity securities	0	0
Nonmarketable equity securities	3,450	3,447
Loans HFS	4,290	29,116
Loans HFI, net of allowance	0	0
Accrued interest receivable	0	0
Financial liabilities:
Deposits	2,911,118	2,344,969
Accrued interest payable	1,310	1,774
Level 3
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits in other banks	0	0
Securities AFS	0	0
Equity securities	0	0
Nonmarketable equity securities	0	0
Loans HFS	0	0
Loans HFI, net of allowance	1,674,900	1,578,398
Accrued interest receivable	6,245	6,880
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
Carrying Amount
Financial assets:
Cash and due from banks	23,143	29,537
Interest-bearing deposits in other banks	761,721	417,664
Securities AFS	659,178	498,206
Equity securities	7,846	4,021
Nonmarketable equity securities	3,450	3,447
Loans HFS	4,290	29,116
Loans HFI, net of allowance	1,664,656	1,570,495
Accrued interest receivable	6,245	6,880
Financial liabilities:
Deposits	2,910,348	2,340,360
Accrued interest payable	1,310	1,774
Fair Value
Financial assets:
Cash and due from banks	23,143	29,537
Interest-bearing deposits in other banks	761,721	417,664
Securities AFS	659,178	498,206
Equity securities	7,846	4,021
Nonmarketable equity securities	3,450	3,447
Loans HFS	4,290	29,116
Loans HFI, net of allowance	1,674,900	1,578,398
Accrued interest receivable	6,245	6,880
Financial liabilities:
Deposits	2,911,118	2,344,969
Accrued interest payable	$ 1,310	$ 1,774