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Stockholders' Equity Stockholders' Equity (Tables) | 12 Months Ended
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Mar. 31, 2018
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, 2018 and 2017.
|  | March 31, 2018 |  | March 31, 2017
($ in thousands) |  | Amount |  | Ratio |  | Amount |  | Ratio
Tier 1 leverage capital |  |  |  |  |  |  |  |
Regulatory capital |  | $ | 67,742 |  |  | 10.16 | % |  | $ | 61,960 |  |  | 8.98 | %
Individual minimum capital requirement |  | 60,022 |  |  | 9.00 | % |  | 62,092 |  |  | 9.00 | %
Minimum capital requirement |  | 26,676 |  |  | 4.00 | % |  | 27,597 |  |  | 4.00 | %
Excess |  | 41,066 |  |  | 6.16 | % |  | 34,363 |  |  | 4.98 | %
Common equity Tier 1 |  |  |  |  |  |  |  |
Regulatory capital |  | $ | 67,742 |  |  | 15.20 | % |  | $ | 61,960 |  |  | 11.88 | %
Minimum capital requirement |  | 20,050 |  |  | 4.50 | % |  | 23,470 |  |  | 4.50 | %
Excess |  | 47,692 |  |  | 10.70 | % |  | 38,490 |  |  | 7.38 | %
Tier 1 risk-based capital |  |  |  |  |  |  |  |
Regulatory capital |  | $ | 67,742 |  |  | 15.20 | % |  | $ | 61,960 |  |  | 11.88 | %
Minimum capital requirement |  | 26,733 |  |  | 6.00 | % |  | 31,294 |  |  | 6.00 | %
Excess |  | 41,009 |  |  | 9.20 | % |  | 30,666 |  |  | 5.88 | %
Total risk-based capital |  |  |  |  |  |  |  |
Regulatory capital |  | $ | 73,082 |  |  | 16.40 | % |  | $ | 67,020 |  |  | 12.85 | %
Individual minimum capital requirement |  | 53,465 |  |  | 12.00 | % |  | 62,588 |  |  | 12.00 | %
Minimum capital requirement |  | 35,644 |  |  | 8.00 | % |  | 41,725 |  |  | 8.00 | %
Excess |  | 37,438 |  |  | 8.40 | % |  | 25,295 |  |  | 4.85 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958577-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 + Details
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