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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Sep. 30, 2018
Quarterly Financial Information Disclosure [Abstract] |
Summary of unaudited interim results of operations by quarter | The following is a summary of the unaudited interim results of operations by quarter for the years presented.
Twelve Months Ended September 30, 2018 | First Quarter | Second Quarter | Third Quarter | Fourth Quarter
| (In thousands, except per share data)
Interest income | $ | 145,780 |  | $ | 149,079 |  | $ | 155,072 |  | $ | 157,152 |
Interest expense | 30,045 |  | 31,778 |  | 35,220 |  | 37,901 |
Net interest income | 115,735 |  | 117,301 |  | 119,852 |  | 119,251 |
Provision (release) for loan losses | — |  | (950 | ) | 1,000 |  | (5,500 | )
Other operating income (including REO gain (loss), net) | 6,841 |  | 12,309 |  | 12,619 |  | 12,207 |
Other operating expense | 61,941 |  | 65,787 |  | 66,977 |  | 69,617 |
Income before income taxes | 60,635 |  | 64,773 |  | 64,494 |  | 67,341 |
Income tax expense | 8,965 |  | 15,502 |  | 13,100 |  | 15,826 |
Net income | $ | 51,670 |  | $ | 49,271 |  | $ | 51,394 |  | $ | 51,515 |
Basic earnings per share | $ | 0.59 |  | $ | 0.58 |  | $ | 0.61 |  | $ | 0.62 |
Diluted earnings per share | 0.59 |  | 0.57 |  | 0.61 |  | 0.62 |
Cash dividends paid per share | 0.15 |  | 0.17 |  | 0.17 |  | 0.18 |
Twelve Months Ended September 30, 2017 | First Quarter | Second Quarter | Third Quarter | Fourth Quarter
| (In thousands, except per share data)
Interest income | $ | 132,764 |  | $ | 136,198 |  | $ | 137,716 |  | $ | 142,240 |
Interest expense | 29,612 |  | 28,471 |  | 29,101 |  | 29,808 |
Net interest income | 103,152 |  | 107,727 |  | 108,615 |  | 112,432 |
Provision (release) for loan losses | — |  | (1,600 | ) | — |  | (500 | )
Other operating income (including REO gain (loss), net) | 12,294 |  | 10,931 |  | 13,798 |  | 16,686 |
Other operating expense | 54,341 |  | 57,467 |  | 57,062 |  | 62,649 |
Income before income taxes | 61,105 |  | 62,791 |  | 65,351 |  | 66,969 |
Income tax expense | 19,859 |  | 20,721 |  | 21,239 |  | 20,865 |
Net income | $ | 41,246 |  | $ | 42,070 |  | $ | 44,112 |  | $ | 46,104 |
Basic earnings per share | $ | 0.46 |  | $ | 0.47 |  | $ | 0.49 |  | $ | 0.53 |
Diluted earnings per share | 0.46 |  | 0.47 |  | 0.49 |  | 0.52 |
Cash dividends paid per share | 0.14 |  | 0.40 |  | 0.15 |  | 0.15 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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