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Consolidated Statements of Stockholder's Equity - USD ($) shares in Thousands, $ in Thousands | Total | Cumulative Effect Period of Adoption Adjustment | Net Investment Hedging | Common Stock | Additional Paid-In Capital | Accumulated Deficit | Accumulated Deficit Cumulative Effect Period of Adoption Adjustment | Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Net Investment Hedging
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Sep. 30, 2019 | $ 1,201,998 | $ (1,572) |  | $ 1,149 | $ 1,502,949 | $ (191,390) | $ (1,572) | $ (110,710) |
Beginning balance (in shares) at Sep. 30, 2019 |  |  |  | 114,899 |  |  |  |  |
Accounting Standards Update [Extensible List] |  | us-gaap:AccountingStandardsUpdate201602Member |  |  |  |  | us-gaap:AccountingStandardsUpdate201602Member |  |
Common stock issued for employee stock-based awards |  |  |  | $ 9 | (9) |  |  |  |
Common stock issued for employee stock-based awards (in shares) |  |  |  | 903 |  |  |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (22,849) |  |  | $ (3) | (22,846) |  |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  |  |  | (308) |  |  |  |  |
Compensation expense from stock-based awards | 27,936 |  |  |  | 27,936 |  |  |  |
Net income | 35,455 |  |  |  |  | 35,455 |  |  |
Unrealized loss on net investment hedges, net of tax |  |  | $ (3,343) |  |  |  |  |  | $ (3,343)
Foreign currency translation adjustment | 10,147 |  |  |  |  |  |  | 10,147 |
Unrealized loss on available-for-sale securities, net of tax | (7) |  |  |  |  |  |  | (7) |
Change in pension benefits, net of tax | 52 |  |  |  |  |  |  | 52 |
Ending balance at Dec. 28, 2019 | 1,247,817 |  |  | $ 1,155 | 1,508,030 | (157,507) |  | (103,861) |
Ending balance (in shares) at Dec. 28, 2019 |  |  |  | 115,494 |  |  |  |  |
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 |  |  | 116,125 |  |  |  |  |
Common stock issued for employee stock-based awards |  |  |  | $ 8 | (8) |  |  |  |
Common stock issued for employee stock-based awards (in shares) |  |  |  | 802 |  |  |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | $ (25,431) |  |  | $ (2) | (25,429) |  |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  |  |  | (263) |  |  |  |  |
Compensation expense from stock-based awards | 46,088 |  |  |  | 46,088 |  |  |  |
Net income | 23,515 |  |  |  |  | 23,515 |  |  |
Unrealized loss on net investment hedges, net of tax |  |  | $ (6,779) |  |  |  |  |  | $ (6,779)
Foreign currency translation adjustment | 19,975 |  |  |  |  |  |  | 19,975 |
Unrealized loss on available-for-sale securities, net of tax | (307) |  |  |  |  |  |  | (307) |
Change in pension benefits, net of tax | (380) |  |  |  |  |  |  | (380) |
Ending balance at Dec. 31, 2020 | $ 1,494,929 |  |  | $ 1,167 | $ 1,623,379 | $ (38,752) |  | $ (90,865) |
Ending balance (in shares) at Dec. 31, 2020 | 116,664 |  |  | 116,664 |  |  |  |  |

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