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Equity (Tables) | 12 Months Ended
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Sep. 30, 2011
Equity [Abstract] |
Schedule of compliance with regulatory capital requirements | There are no conditions or events since that notification that management believes have changed the Bank's categorization.
| Actual | Capital Adequacy Guidelines | Categorized as Well Capitalized Under Prompt Corrective Action Provisions
| Capital | Ratio | Capital | Ratio | Capital | Ratio
September 30, 2011 | (In thousands)
Total capital to risk-weighted assets | $ | 1,624,817 |  | 24.68 | % | $ | 526,765 |  | 8.00% | $ | 658,456 |  | 10.00%
Tier I capital to risk-weighted assets | 1,543,438 |  | 23.44 |  | NA |  | NA | 395,074 |  | 6.00
Core capital to adjusted tangible assets | 1,543,438 |  | 11.82 |  | NA |  | NA | 652,672 |  | 5.00
Core capital to total assets | 1,543,438 |  | 11.82 |  | 391,603 |  | 3.00 | NA |  | NA
Tangible capital to tangible assets | 1,543,438 |  | 11.82 |  | 195,802 |  | 1.50 | NA |  | NA
September 30, 2010 |  |  |  |  |  |
Total capital to risk-weighted assets | $ | 1,619,206 |  | 23.39 | % | $ | 553,761 |  | 8.00% | $ | 692,201 |  | 10.00%
Tier I capital to risk-weighted assets | 1,534,681 |  | 22.17 |  | NA |  | NA | 415,321 |  | 6.00
Core capital to adjusted tangible assets | 1,534,681 |  | 11.67 |  | NA |  | NA | 657,606 |  | 5.00
Core capital to total assets | 1,534,681 |  | 11.67 |  | 394,563 |  | 3.00 | NA |  | NA
Tangible capital to tangible assets | 1,534,681 |  | 11.67 |  | 197,282 |  | 1.50 | NA |  | NA

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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=6918689&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 1G -URI http://asc.fasb.org/extlink&oid=6918689&loc=SL5958577-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 17 -Paragraph 18 -IssueDate 2006-05-01 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -URI http://asc.fasb.org/extlink&oid=6918689&loc=d3e65071-112826 -Subparagraph (c)(2) Reference 5: 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=6918689&loc=SL5958568-112826 + Details
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