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Regulatory Restrictions and Capital Ratios (Tables)
 12 Months Ended
Dec. 31, 2022
Regulatory Capital Requirements [Abstract]  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
Minimum for capital
Minimum to be
 
Actual
adequacy purposes
well capitalized
(Dollars in thousands)
Amount
Ratio
Amount
Ratio
Amount
Ratio
At December 31, 2022:
Tier 1 Leverage Capital
$
106,886
10.01
%
$
42,716
4.00
%
$
53,394
5.00
%
Common Equity Tier 1 Capital
106,886
15.39
31,252
4.50
45,142
6.50
Tier 1 Risk-Based Capital
106,886
15.39
41,669
6.00
55,559
8.00
Total Risk-Based Capital
112,851
16.25
55,559
8.00
69,449
10.00
At December 31, 2021:
Tier 1 Leverage Capital
$
100,059
9.35
%
$
42,808
4.00
%
$
53,509
5.00
%
Common Equity Tier 1 Capital
100,059
16.23
27,742
4.50
40,072
6.50
Tier 1 Risk-Based Capital
100,059
16.23
36,990
6.00
49,320
8.00
Total Risk-Based Capital
105,163
17.06
49,320
8.00
61,649
10.00