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Financial Information - Washington Federal, INC. (Tables) | 12 Months Ended
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Sep. 30, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract] |
Schedule of condensed financial information | The following Washington Federal, Inc. (parent company only) financial information should be read in conjunction with the other notes to the Consolidated Financial Statements.
Condensed Statements of Financial Condition |  |
| September 30, 2017 | September 30, 2016
| (In thousands)
Assets |  |
Cash | $ | 33,077 |  | $ | 24,300 |
Other assets | — |  | 15 |
Investment in subsidiary | 1,972,675 |  | 1,954,179 |
Total assets | $ | 2,005,752 |  | $ | 1,978,494 |
Liabilities |  |
Other liabilities | $ | 64 |  | $ | 2,763 |
Total liabilities | 64 |  | 2,763 |
Stockholders’ equity |  |
Total stockholders’ equity | 2,005,688 |  | 1,975,731 |
Total liabilities and stockholders’ equity | $ | 2,005,752 |  | $ | 1,978,494 |
Condensed Statements of Operations |  |  |
Twelve Months Ended September 30, | 2017 | 2016 | 2015
| (In thousands)
Income |  |  |
Dividends from subsidiary | $ | 171,500 |  | $ | 148,000 |  | $ | 175,000 |
Total Income | 171,500 |  | 148,000 |  | 175,000 |
Expense |  |  |
Miscellaneous | 435 |  | 435 |  | 439 |
Total expense | 435 |  | 435 |  | 439 |
Net income (loss) before equity in undistributed net income (loss) of subsidiary | 171,065 |  | 147,565 |  | 174,561 |
Equity in undistributed net income of subsidiary | 2,326 |  | 16,336 |  | (14,402 | )
Income before income taxes | 173,391 |  | 163,901 |  | 160,159 |
Income tax benefit (expense) | 141 |  | 148 |  | 157 |
Net income | $ | 173,532 |  | $ | 164,049 |  | $ | 160,316 |
Condensed Statements of Cash Flows |  |  |
Twelve Months Ended September 30, | 2017 | 2016 | 2015
| (In thousands)
Cash Flows From Operating Activities |  |  |
Net income | $ | 173,532 |  | $ | 164,049 |  | $ | 160,316 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Equity in undistributed net income (loss) of subsidiaries | 3,584 |  | (12,677 | ) | 32,375 |
Decrease (increase) in other assets | 15 |  | (15 | ) | — |
Increase (decrease) in other liabilities | (2,699 | ) | 1,552 |  | (13,189 | )
Net cash provided by (used in) operating activities | 174,432 |  | 152,909 |  | 179,502 |
Cash Flows From Financing Activities |  |  |
Proceeds from exercise of common stock options and related tax benefit | 7,238 |  | 9,283 |  | 2,070 |
Warrants purchased | — |  | (7,744 | ) | — |
Treasury stock purchased | (98,374 | ) | (87,850 | ) | (126,728 | )
Dividends paid on common stock | (74,519 | ) | (49,926 | ) | (51,111 | )
Net cash provided by (used in) financing activities | (165,655 | ) | (136,237 | ) | (175,769 | )
Increase (decrease) in cash | 8,777 |  | 16,672 |  | 3,733 |
Cash at beginning of year | 24,300 |  | 7,628 |  | 3,895 |
Cash at end of year | $ | 33,077 |  | $ | 24,300 |  | $ | 7,628 |

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