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Stockholders' Equity (Tables) | 12 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Schedule of compliance with regulatory capital requirements | To be categorized as well capitalized, the Bank must maintain minimum Common Equity Tier 1, Tier 1 risk-based, Total risk-based and Tier 1 leverage ratios as set forth in the following table. The Bank's actual capital amounts and ratios as of these dates are also presented. There are no conditions or events since that management believes have changed the Bank's categorization.
| Actual |  | Capital Adequacy Guidelines | Categorized as Well Capitalized Under Prompt Corrective Action Provisions
| Capital | Ratio |  | Ratio | Ratio
September 30, 2018 | (In thousands)
Common Equity Tier 1 risk-based capital ratio: |  |  |  |  |
The Company | $ | 1,678,475 |  | 14.71 | % |  | 4.50 | % | NA |
The Bank | 1,661,628 |  | 14.55 |  |  | 4.50 |  | 6.50 | %
Tier 1 risk-based capital ratio: |  |  |  |  |
The Company | 1,678,475 |  | 14.71 |  |  | 6.00 |  | NA |
The Bank | 1,661,628 |  | 14.55 |  |  | 6.00 |  | 8.00 |
Total risk-based capital ratio: |  |  |  |  |
The Company | 1,814,981 |  | 15.91 |  |  | 8.00 |  | NA |
The Bank | 1,798,135 |  | 15.75 |  |  | 8.00 |  | 10.00 |
Tier 1 leverage ratio: |  |  |  |  |
The Company | 1,678,475 |  | 10.85 |  |  | 4.00 |  | NA |
The Bank | 1,661,628 |  | 10.74 |  |  | 4.00 |  | 5.00 |
September 30, 2017 |  |  |  |  |
Common Equity Tier 1 risk-based capital ratio: |  |  |  |  |
The Company | $ | 1,701,327 |  | 15.99 | % | (1) | 4.50 | % | NA |
The Bank | 1,668,314 |  | 15.68 |  | (1) | 4.50 |  | 6.50 | %
Tier 1 risk-based capital ratio: |  |  |  |  |
The Company | 1,701,327 |  | 15.99 |  | (1) | 6.00 |  | NA |
The Bank | 1,668,314 |  | 15.68 |  | (1) | 6.00 |  | 8.00 |
Total risk-based capital ratio: |  |  |  |  |
The Company | 1,828,935 |  | 17.22 |  | (1) | 8.00 |  | NA |
The Bank | 1,795,929 |  | 16.91 |  | (1) | 8.00 |  | 10.00 |
Tier 1 leverage ratio: |  |  |  |  |
The Company | 1,701,327 |  | 11.49 |  |  | 4.00 |  | NA |
The Bank | 1,668,314 |  | 11.27 |  |  | 4.00 |  | 5.00 |
(1) Ratio has been updated from previously reported % to correct immaterial error in the calculation of risk-weighted assets, which is the denominator used in calculating the ratio.
Schedule of earnings per share calculation | The following table sets forth information regarding earnings per share calculations.
Year ended September 30, | 2018 |  | 2017 |  | 2016
Weighted average shares outstanding | 85,008,040 |  |  | 88,905,457 |  |  | 91,399,038 |
Weighted average dilutive warrants | 63,079 |  |  | 242,979 |  |  | 440,366 |
Weighted average dilutive options | 38,724 |  |  | 75,771 |  |  | 73,514 |
Weighted average diluted shares | 85,109,843 |  |  | 89,224,207 |  |  | 91,912,918 |
Net income (In thousands) | $ | 203,850 |  |  | $ | 173,532 |  |  | $ | 164,049 |
Basic EPS | $ | 2.40 |  |  | $ | 1.95 |  |  | $ | 1.79 |
Diluted EPS | 2.40 |  |  | 1.94 |  |  | 1.78 |

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