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Customer Accounts (Tables) | 12 Months Ended
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Sep. 30, 2017
Banking and Thrift [Abstract] |
Schedule of deposits | The following table provides the composition of the Company's customer accounts, including interest rate buckets and maturity buckets for time deposits.
| September 30, 2017 | September 30, 2016
| (In thousands)
Checking accounts, 0.15% and under | $ | 3,019,095 |  | $ | 2,721,721 |
Savings accounts, 0.10% and under | 888,881 |  | 820,980 |
Money market accounts, 0.01% to 0.15% | 2,453,182 |  | 2,462,891 |
Time deposit accounts |  |
Less than 1.00% | 2,204,756 |  | 3,268,272 |
1.00% to 1.99% | 2,099,841 |  | 1,292,612 |
2.00% to 2.99% | 169,253 |  | 34,376 |
Total time deposits | 4,473,850 |  | 4,595,260 |
| $ | 10,835,008 |  | $ | 10,600,852 |
Time deposit maturities are as follows: | September 30, 2017 | September 30, 2016
| (In thousands)
Within 1 year | $ | 2,553,712 |  | $ | 2,894,900 |
1 to 2 years | 975,351 |  | 798,309 |
2 to 3 years | 386,763 |  | 293,058 |
Over 3 years | 558,024 |  | 608,993 |
| $ | 4,473,850 |  | $ | 4,595,260 |
Schedule of interest expense on customer deposits | Interest expense on customer accounts consisted of the following:
Year ended September 30, | 2017 | 2016 | 2015
| (In thousands)
Checking accounts | $ | 2,721 |  | $ | 1,491 |  | $ | 1,036 |
Savings accounts | 978 |  | 734 |  | 660 |
Money market accounts | 3,592 |  | 3,285 |  | 3,631 |
Time deposit accounts | 45,256 |  | 47,425 |  | 46,273 |
| 52,547 |  | 52,935 |  | 51,600 |
Less early withdrawal penalties | (524 | ) | (450 | ) | (546 | )
| $ | 52,023 |  | $ | 52,485 |  | $ | 51,054 |
Weighted average interest rate at end of year | 0.54 | % | 0.50 | % | 0.48 | %
Weighted daily average interest rate during the year | 0.49 | % | 0.50 | % | 0.48 | %

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