Allowance for Loan Losses - Risk Ratings by Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	$ 968,495	$ 827,484
Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	576,198	442,121
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	79,365	56,565
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	264,570	285,015
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	48,362	43,783
1 Strong
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,118	2,421
1 Strong | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
1 Strong | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
1 Strong | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,118	2,402
1 Strong | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	19
2 Above average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	61,021	56,546
2 Above average | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	6,977	5,938
2 Above average | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	169	2,343
2 Above average | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	7,328	6,326
2 Above average | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	46,547	41,939
3 Satisfactory
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	162,198	199,165
3 Satisfactory | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	98,473	91,475
3 Satisfactory | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,589	2,889
3 Satisfactory | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	60,787	104,432
3 Satisfactory | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	349	369
4 Average
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	581,056	414,786
4 Average | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	378,147	261,539
4 Average | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	47,196	31,221
4 Average | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	154,247	120,570
4 Average | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	1,466	1,456
5 Watch
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	156,032	137,026
5 Watch | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	88,679	72,840
5 Watch | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	29,411	19,893
5 Watch | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	37,942	44,293
5 Watch | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
6 OAEM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	3,534	2,988
6 OAEM | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	3,482	2,754
6 OAEM | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
6 OAEM | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	52	234
6 OAEM | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
7 Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,536	14,552
7 Substandard | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	440	7,575
7 Substandard | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	219
7 Substandard | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	2,096	6,758
7 Substandard | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
8 Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
8 Doubtful | Commercial | Real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
8 Doubtful | Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
8 Doubtful | Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	0	0
8 Doubtful | Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Risk rated loans receivable	$ 0	$ 0