Fair Value Measurement - Fair Value, by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial instruments - assets
AFS, at fair value	$ 218,064	$ 237,878
Estimated Fair Value	341,006	348,505
Loans held for sale	4,270	2,475
Derivative assets	18,608	11,703
Level 1
Financial instruments - assets
Cash and cash equivalents	118,099	60,881
AFS, at fair value	0	0
Estimated Fair Value	0	0
Equity securities	413	430
Loans held for sale	0	0
Net loans	0	0
Restricted investment in bank stocks	13,554	8,315
Accrued interest receivable	24,230	18,405
Derivative assets	0	0
Financial instruments - liabilities
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated debt	0	0
Accrued interest payable	14,657	2,303
Derivative liabilities	0	0
Level 2
Financial instruments - assets
Cash and cash equivalents	0	0
AFS, at fair value	218,064	237,878
Estimated Fair Value	341,006	348,505
Equity securities	0	0
Loans held for sale	4,270	2,475
Net loans	0	0
Restricted investment in bank stocks	0	0
Accrued interest receivable	0	0
Derivative assets	18,608	11,703
Financial instruments - liabilities
Deposits	3,902,627	3,761,260
Short-term borrowings	139,000	102,647
Long-term debt	54,047	1,069
Subordinated debt	38,669	55,917
Accrued interest payable	0	0
Derivative liabilities	14,080	11,737
Level 3
Financial instruments - assets
Cash and cash equivalents	0	0
AFS, at fair value	0	0
Estimated Fair Value	0	0
Equity securities	0	0
Loans held for sale	0	0
Net loans	3,930,893	3,439,948
Restricted investment in bank stocks	0	0
Accrued interest receivable	0	0
Derivative assets	0	0
Financial instruments - liabilities
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated debt	0	0
Accrued interest payable	0	0
Derivative liabilities	0	0
Carrying Amount
Financial instruments - assets
Cash and cash equivalents	118,099	60,881
AFS, at fair value	218,064	237,878
Estimated Fair Value	401,561	399,494
Equity securities	413	430
Loans held for sale	4,270	2,475
Net loans	4,111,653	3,495,162
Restricted investment in bank stocks	13,554	8,315
Accrued interest receivable	24,230	18,405
Derivative assets	18,608	11,703
Financial instruments - liabilities
Deposits	4,381,616	3,778,331
Short-term borrowings	139,000	102,647
Long-term debt	55,771	1,119
Subordinated debt	46,501	56,941
Accrued interest payable	14,657	2,303
Derivative liabilities	14,080	11,737
Estimated Fair Value
Financial instruments - assets
Cash and cash equivalents	118,099	60,881
AFS, at fair value	218,064	237,878
Estimated Fair Value	341,006	348,505
Equity securities	413	430
Loans held for sale	4,270	2,475
Net loans	3,930,893	3,439,948
Restricted investment in bank stocks	13,554	8,315
Accrued interest receivable	24,230	18,405
Derivative assets	18,608	11,703
Financial instruments - liabilities
Deposits	3,902,627	3,761,260
Short-term borrowings	139,000	102,647
Long-term debt	54,047	1,069
Subordinated debt	38,669	55,917
Accrued interest payable	14,657	2,303
Derivative liabilities	$ 14,080	$ 11,737