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Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2017
Banking and Thrift [Abstract]  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations
The following table sets forth certain information concerning the Bank’s regulatory capital as of the dates presented. The capital adequacy ratios disclosed below are exclusive of the capital conservation buffer. 
(Dollar amounts in thousands)
 
December 31, 2017
 
December 31, 2016
 
 
Amount
 
Ratio
 
Amount
 
Ratio
Total capital to risk-weighted assets:
 
 

 
 

 
 

 
 

Actual
 
$
64,221

 
12.96
%
 
$
58,605

 
13.23
%
For capital adequacy purposes
 
39,630

 
8.00
%
 
35,424

 
8.00
%
To be well capitalized
 
49,537

 
10.00
%
 
44,280

 
10.00
%
Tier 1 capital to risk-weighted assets:
 
 

 
 

 
 

 
 

Actual
 
$
58,088

 
11.73
%
 
$
53,050

 
11.98
%
For capital adequacy purposes
 
29,722

 
6.00
%
 
26,568

 
6.00
%
To be well capitalized
 
39,630

 
8.00
%
 
35,424

 
8.00
%
Common Equity Tier 1 capital to risk-weighted assets:
 
 

 
 

 
 

 
 

Actual
 
$
58,088

 
11.73
%
 
$
53,050

 
11.98
%
For capital adequacy purposes
 
22,292

 
4.50
%
 
19,926

 
4.50
%
To be well capitalized
 
32,199

 
6.50
%
 
28,782

 
6.50
%
Tier 1 capital to average assets:
 
 

 
 

 
 

 
 

Actual
 
$
58,088

 
7.71
%
 
$
53,050

 
7.84
%
For capital adequacy purposes
 
30,117

 
4.00
%
 
27,081

 
4.00
%
To be well capitalized
 
37,647

 
5.00
%
 
33,852

 
5.00
%