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Other Borrowings (Tables) | 12 Months Ended
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Sep. 30, 2012
Other Borrowings [Abstract] |
Schedule of maturity dates of securities sold under agreements to repurchase and other borrowings | Maturity dates of securities sold under agreements to repurchase (reverse repurchase agreements) and other borrowings were as follows:
September 30, | 2012 | 2011
| (In thousands)
Reverse repurchase agreements and other borrowings: |  |
Within 1 year | $ | — |  | $ | — |
1 to 3 years | — |  | 300,000 |
4 to 5 years | — |  | 300,000 |
More than 5 years | — |  | 200,000 |
| $ | — |  | $ | 800,000 |
Schedule of maturity dates of reverse repurchase agreements and other borrowings if callable agreements called at earliest dates | If these were to be called at the earliest call dates, the maturities of the reverse repurchase agreements and other borrowings would be as follows:
September 30, | 2012 | 2011
| (In thousands)
Reverse repurchase agreements and other borrowings: |  |
Within 1 year | $ | — |  | $ | 200,000 |
1 to 3 years | — |  | 300,000 |
4 to 5 years | — |  | 300,000 |
More than 5 years | — |  | — |
| $ | — |  | $ | 800,000 |
Schedule of financial data pertaining to weighted-average cost and amount of securities sold under agreements to repurchase | Financial data pertaining to the weighted-average cost and the amount of securities sold under agreements to repurchase were as follows:
September 30, | 2012 | 2011 | 2010
| (Dollars in thousands) |  |
Weighted average interest rate at end of year | — | % | 3.90 | % | 3.90 | %
Weighted daily average interest rate during the year | 3.71 | % | 3.73 | % | 3.90 | %
Daily average of securities sold under agreements to repurchase | $ | 692,896 |  | $ | 800,000 |  | $ | 800,000 |
Maximum securities sold under agreements to repurchase at any month end | 800,000 |  | 800,000 |  | 800,000 |
Interest expense during the year | 25,693 |  | 29,867 |  | 29,867 |
Schedule of financial data pertaining to weighted-average cost and amount of other borrowings | Financial data pertaining to the weighted average cost and the amount of other borrowings were as follows:
September 30, | 2012 | 2011 | 2010
| (Dollars in thousands) |  |
Weighted average interest rate at end of year | — | % | — | % | — | %
Weighted daily average interest rate during the year | — | % | — | % | 4.98 | %
Daily average of other borrowings | — |  | $ | — |  | $ | 9,479 |
Maximum other borrowings at any month end | — |  | — |  | 14,310 |
Interest expense during the year | — |  | — |  | 22 |

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