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Stockholders' Equity (Tables) | 12 Months Ended
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Sep. 30, 2017
Equity [Abstract] |
Schedule of compliance with regulatory capital requirements |
| Actual | Capital Adequacy Guidelines | Categorized as Well Capitalized Under Prompt Corrective Action Provisions
| Capital | Ratio | Ratio | Ratio
September 30, 2017 | (In thousands)
Common Equity Tier 1 risk-based capital ratio: |  |  |  |
The Company | $ | 1,701,327 |  | 16.67 | % | 4.50 | % | NA |
The Bank | 1,668,314 |  | 16.35 |  | 4.50 |  | 6.50 | %
Tier 1 risk-based capital ratio: |  |  |  |
The Company | 1,701,327 |  | 16.67 |  | 6.00 |  | NA |
The Bank | 1,668,314 |  | 16.35 |  | 6.00 |  | 8.00 |
Total risk-based capital ratio: |  |  |  |
The Company | 1,828,935 |  | 17.92 |  | 8.00 |  | NA |
The Bank | 1,795,929 |  | 17.60 |  | 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 |
September 30, 2016 |  |  |  |
Common Equity Tier 1 risk-based capital ratio: |  |  |  |
The Company | $ | 1,690,380 |  | 17.54 | % | 4.50 | % | NA |
The Bank | 1,668,828 |  | 17.32 |  | 4.50 |  | 6.50 | %
Tier 1 risk-based capital ratio: |  |  |  |
The Company | 1,690,380 |  | 17.54 |  | 6.00 |  | NA |
The Bank | 1,668,828 |  | 17.32 |  | 6.00 |  | 8.00 |
Total risk-based capital ratio: |  |  |  |
The Company | 1,807,740 |  | 18.76 |  | 8.00 |  | NA |
The Bank | 1,786,188 |  | 18.54 |  | 8.00 |  | 10.00 |
Tier 1 leverage ratio: |  |  |  |
The Company | 1,690,380 |  | 11.60 |  | 4.00 |  | NA |
The Bank | 1,668,828 |  | 11.45 |  | 4.00 |  | 5.00 |
Schedule of weighted average number of shares | The following table sets forth information regarding earnings per share calculations.
Year ended September 30, | 2017 |  | 2016 |  | 2015
Weighted average shares outstanding | 88,905,457 |  |  | 91,399,038 |  |  | 95,644,639 |
Weighted average dilutive warrants | 242,979 |  |  | 440,366 |  |  | 340,016 |
Weighted average dilutive options | 75,771 |  |  | 73,514 |  |  | 69,304 |
Weighted average diluted shares | 89,224,207 |  |  | 91,912,918 |  |  | 96,053,959 |
Net income (In thousands) | $ | 173,532 |  |  | $ | 164,049 |  |  | $ | 160,316 |
Basic EPS | $ | 1.95 |  |  | $ | 1.79 |  |  | $ | 1.68 |
Diluted EPS | 1.94 |  |  | 1.78 |  |  | 1.67 |

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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://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 3: http://www.xbrl.org/2003/role/presentationRef -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 4: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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