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CONSOLIDATED CONDENSED STATEMENT OF SHAREHOLDERS' EQUITY - 3 months ended Dec. 31, 2017 - USD ($) $ in Thousands | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock | Total
--- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Sep. 30, 2017 | $ 11,196 | $ 487,248 | $ 3,855,686 | $ 2,300 | $ (191,839) | $ 4,164,591
Balance (in shares) at Sep. 30, 2017 | 111,957,000 |  |  |  |  | 111,956,875
Balance (in shares) at Sep. 30, 2017 |  |  |  |  | 3,353,000 |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |
Net income (loss) | $ 0 | 0 | 500,106 | 0 | $ 0 | $ 500,106
Other comprehensive income (loss) |  |  |  | (261) |  | (261)
Dividends declared |  |  | (76,911) |  |  | (76,911)
Exercise of stock options, net of shares withheld for employee taxes |  | (3,976) |  |  | $ 3,485 | (491)
Exercise of stock options, net of tax withholding (in shares) | 1,000 |  |  |  | (61,000) |
Stock issued for vested restricted stock, net of shares withheld for employee taxes | $ 5 | (11,317) |  |  | $ 7,224 | $ (4,088)
Stock issued for vested restricted stock, net of shares withheld for employee taxes (in shares) | 51,000 |  |  |  | (128,000) |
Repurchase of common stock (in shares) |  |  |  |  |  | 0
Stock-based compensation |  | 7,087 |  |  |  | $ 7,087
Balance at end of period at Dec. 31, 2017 | $ 11,201 | 479,914 | 4,278,326 | $ 2,039 | $ (181,130) | $ 4,590,350
Balance (in shares) at Dec. 31, 2017 | 112,009,000 |  |  |  |  | 112,008,961
Balance (in shares) at Dec. 31, 2017 |  |  |  |  | 3,164,000 |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |
Cumulative effect of adopting Accounting Standards Update 2016-09 | ASU 2016-09 |  | $ 872 | $ (555) |  |  | $ 317

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