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Stockholders' Equity Stockholders' Equity (Tables)
 12 Months Ended
Mar. 31, 2019
Stockholders' Equity Note [Abstract]  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations
The table below presents the Bank's regulatory capital ratios at March 31, 2019 and 2018.
 
 
March 31, 2019
 
March 31, 2018
($ in thousands)
 
Amount
 
Ratio
 
Amount
 
Ratio
Tier 1 leverage capital
 
 
 
 
 
 
 
 
Regulatory capital
 
$
62,875

 
10.77
%
 
$
67,742

 
10.16
%
Individual minimum capital requirement
 
52,525

 
9.00
%
 
60,022

 
9.00
%
Minimum capital requirement
 
23,344

 
4.00
%
 
26,676

 
4.00
%
Excess
 
39,531

 
6.77
%
 
41,066

 
6.16
%
 
 
 
 
 
 
 
 
 
Common equity Tier 1
 
 
 
 
 
 
 
 
Regulatory capital
 
$
62,875

 
15.39
%
 
$
67,742

 
15.20
%
Minimum capital requirement
 
18,388

 
4.50
%
 
20,050

 
4.50
%
Excess
 
44,487

 
10.89
%
 
47,692

 
10.70
%
 
 
 
 
 
 
 
 
 
Tier 1 risk-based capital
 
 
 
 
 
 
 
 
Regulatory capital
 
$
62,875

 
15.39
%
 
$
67,742

 
15.20
%
Minimum capital requirement
 
24,518

 
6.00
%
 
26,733

 
6.00
%
Excess
 
38,357

 
9.39
%
 
41,009

 
9.20
%
 
 
 
 
 
 
 
 
 
Total risk-based capital
 
 
 
 
 
 
 
 
Regulatory capital
 
$
67,766

 
16.58
%
 
$
73,082

 
16.40
%
Individual minimum capital requirement
 
49,036

 
12.00
%
 
53,465

 
12.00
%
Minimum capital requirement
 
32,691

 
8.00
%
 
35,644

 
8.00
%
Excess
 
35,075

 
8.58
%
 
37,438

 
8.40
%