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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Sep. 30, 2016 |  | 111,400,000 |  |  |  |
Balance (in shares) at Sep. 30, 2016 |  |  |  |  |  | 3,322,000
Balance at Sep. 30, 2016 | $ 4,560,925 | $ 11,140 | $ 448,452 | $ 4,289,807 | $ (204) | $ (188,270)
Comprehensive income (loss): |  |  |  |  |  |
Net income (loss) | (128,212) |  |  | (128,212) |  |
Other comprehensive income (loss) | 2,504 |  |  |  | 2,504 |
Dividends declared | (305,909) |  |  | (305,909) |  |
Exercise of employee stock options, net of shares withheld for employee taxes (in shares) |  | 415,000 |  |  |  | 88,000
Exercise of employee stock options, net of shares withheld for employee taxes | 10,534 | $ 42 | 15,738 |  |  | $ (5,246)
Tax benefit of stock-based awards | 4,414 |  | 4,414 |  |  |
Vesting of restricted stock awards, net of shares withheld for employee taxes (in shares) |  | 142,000 |  |  |  | (57,000)
Vesting of restricted stock awards, net of shares withheld for employee taxes | (5,848) | $ 14 | (7,539) |  |  | $ 1,677
Stock-based compensation | 26,183 |  | 26,183 |  |  |
Balance (in shares) at Sep. 30, 2017 |  | 111,957,000 |  |  |  |
Balance (in shares) at Sep. 30, 2017 |  |  |  |  |  | 3,353,000
Balance at Sep. 30, 2017 | 4,164,591 | $ 11,196 | 487,248 | 3,855,686 | 2,300 | $ (191,839)
Comprehensive income (loss): |  |  |  |  |  |
Net income (loss) | 482,672 |  |  | 482,672 |  |
Other comprehensive income (loss) | 14,250 |  |  |  | 14,250 |
Dividends declared | (310,024) |  |  | (310,024) |  |
Exercise of employee stock options, net of shares withheld for employee taxes (in shares) |  | 1,000 |  |  |  | (202,000)
Exercise of employee stock options, net of shares withheld for employee taxes | 3,435 |  | (7,557) |  |  | $ 10,992
Vesting of restricted stock awards, net of shares withheld for employee taxes (in shares) |  | 51,000 |  |  |  | (136,000)
Vesting of restricted stock awards, net of shares withheld for employee taxes | (4,193) | $ 5 | (11,857) |  |  | $ 7,659
Stock-based compensation | $ 31,687 |  | 31,687 |  |  |
Balance (in shares) at Sep. 30, 2018 | 112,008,961 | 112,009,000 |  |  |  |
Balance (in shares) at Sep. 30, 2018 | 3,015,243 |  |  |  |  | 3,015,000
Balance at Sep. 30, 2018 | $ 4,382,735 | $ 11,201 | 500,393 | 4,027,779 | 16,550 | $ (173,188)
Comprehensive income (loss): |  |  |  |  |  |
Net income (loss) | (33,656) |  |  |  |  |
Other comprehensive income (loss) | (11,875) |  |  |  | (11,875) |
Dividends declared | (313,088) |  |  | (313,088) |  |
Exercise of employee stock options, net of shares withheld for employee taxes (in shares) |  |  |  |  |  | (151,000)
Exercise of employee stock options, net of shares withheld for employee taxes | 1,321 |  | (7,153) |  |  | $ 8,474
Vesting of restricted stock awards, net of shares withheld for employee taxes (in shares) |  | 71,000 |  |  |  | (222,000)
Vesting of restricted stock awards, net of shares withheld for employee taxes | (4,689) | $ 7 | (17,227) |  |  | $ 12,531
Stock-based compensation | 34,292 |  | 34,292 |  |  |
Share repurchases (in shares) |  |  |  |  |  | 1,000,000
Share repurchases | $ (42,779) |  |  |  |  | $ (42,779)
Balance (in shares) at Sep. 30, 2019 | 112,080,262 | 112,080,000 |  |  |  |
Balance (in shares) at Sep. 30, 2019 | 3,642,358 |  |  |  |  | 3,642,000
Balance at Sep. 30, 2019 | $ 4,012,223 | $ 11,208 | $ 510,305 | $ 3,714,307 | $ (28,635) | $ (194,962)

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