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Consolidated Statements of Stockholder's Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings (Accumulated Deficit) | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | ---
Beginning balance at Sep. 30, 2020 | $ 1,438,248 | $ 1,161 | $ 1,602,728 | $ (62,267) | $ (103,374)
Beginning balance (in shares) at Sep. 30, 2020 |  | 116,125,000 |  |  |
Common stock issued for employee stock-based awards | 0 | $ 15 | (15) |  |
Common stock issued for employee stock-based awards (in shares) |  | 1,490,000 |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (53,077) | $ (4) | (53,073) |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  | (466,000) |  |  |
Common stock issued for employee stock purchase plan | 21,575 | $ 2 | 21,573 |  |
Common stock issued for employee stock purchase plan (in shares) |  | 240,000 |  |  |
Compensation expense from stock-based awards | 177,289 |  | 177,289 |  |
Net Income (Loss) | 476,923 |  |  | 476,923 |
Gain (loss) on net investment hedges, net of tax | 1,248 |  |  |  | 1,248
Repurchases of common stock | $ (30,000) | $ (2) | (29,998) |  |
Repurchases of common stock (in shares) | (230,000) | (226,000) |  |  |
Foreign currency translation adjustment | $ 1,613 |  |  |  | 1,613
Unrealized loss on marketable securities, net of tax | (307) |  |  |  | (307)
Change in pension benefits, net of tax | 4,956 |  |  |  | 4,956
Ending balance at Sep. 30, 2021 | 2,038,468 | $ 1,172 | 1,718,504 | 414,656 | (95,864)
Ending balance (in shares) at Sep. 30, 2021 |  | 117,163,000 |  |  |
Common stock issued for employee stock-based awards | 0 | $ 18 | (18) |  |
Common stock issued for employee stock-based awards (in shares) |  | 1,737,000 |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (68,991) | $ (6) | (68,985) |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  | (597,000) |  |  |
Common stock issued for employee stock purchase plan | 21,207 | $ 2 | 21,205 |  |
Common stock issued for employee stock purchase plan (in shares) |  | 215,000 |  |  |
Compensation expense from stock-based awards | 174,863 |  | 174,863 |  |
Net Income (Loss) | 313,081 |  |  | 313,081 |
Gain (loss) on net investment hedges, net of tax | 17,556 |  |  |  | 17,556
Repurchases of common stock | $ (125,000) | $ (11) | (124,989) |  |
Repurchases of common stock (in shares) | (1,050,000.00) | (1,046,000) |  |  |
Foreign currency translation adjustment | $ (92,768) |  |  |  | (92,768)
Unrealized loss on marketable securities, net of tax | 0 |  |  |  |
Change in pension benefits, net of tax | 17,618 |  |  |  | 17,618
Ending balance at Sep. 30, 2022 | $ 2,296,034 | $ 1,175 | 1,720,580 | 727,737 | (153,458)
Ending balance (in shares) at Sep. 30, 2022 | 117,472,000 | 117,472,000 |  |  |
Common stock issued for employee stock-based awards | $ 0 | $ 18 | (18) |  |
Common stock issued for employee stock-based awards (in shares) |  | 1,798,000 |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (82,768) | $ (7) | (82,761) |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  | (620,000) |  |  |
Common stock issued for employee stock purchase plan | 21,652 | $ 2 | 21,650 |  |
Common stock issued for employee stock purchase plan (in shares) |  | 196,000 |  |  |
Compensation expense from stock-based awards | 161,454 |  | 161,454 |  |
Net Income (Loss) | 245,540 |  |  | 245,540 |
Gain (loss) on net investment hedges, net of tax | $ (7,516) |  |  |  | (7,516)
Repurchases of common stock (in shares) | 0 |  |  |  |
Foreign currency translation adjustment | $ 45,692 |  |  |  | 45,692
Unrealized loss on marketable securities, net of tax | 0 |  |  |  |
Change in pension benefits, net of tax | (2,798) |  |  |  | (2,798)
Ending balance at Sep. 30, 2023 | $ 2,677,290 | $ 1,188 | $ 1,820,905 | $ 973,277 | $ (118,080)
Ending balance (in shares) at Sep. 30, 2023 | 118,846,000 | 118,846,000 |  |  |

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