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Stockholders' Equity - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 06, 2021 | Sep. 30, 2021
Stockholders' Equity |  |  |  |
Shares reserved for issuance | 19,100,000 |  |  |
Number of shares counted for grants of full value awards from reserve | 1.5 |  |  |
Number of shares available for grant | 994,605 |  |  |
Remaining number of shares authorized to be repurchased |  |  |  | 0
Treasury stock, value, acquired, cost method | $ 2,963 | $ 4,103 |  |
Common stock surrendered in the exercise of stock options (in shares) | 4,678 | 9,384 |  |
December 6, 2021 Stock Repurchase Plan |  |  |  |
Stockholders' Equity |  |  |  |
Amount yet to be expended under the program | $ 17,000 |  | $ 20,000 |
Shares repurchased | 147,185 |  |  |
Treasury stock, value, acquired, cost method | $ 3,000 |  |  |
Restricted Stock - Service Based |  |  |  |
Stockholders' Equity |  |  |  |
Shares and options vesting period | 4 years |  |  |
Stock Option - Service Based |  |  |  |
Stockholders' Equity |  |  |  |
Shares and options vesting period | 4 years |  |  |
Restricted Stock - Market Based |  |  |  |
Stockholders' Equity |  |  |  |
Shares and options vesting period | 4 years |  |  |
Stock Option - Market-Based |  |  |  |
Stockholders' Equity |  |  |  |
Shares and options vesting period | 4 years |  |  |
SARs |  |  |  |
Stockholders' Equity |  |  |  |
Shares issued | 0 |  |  |
Exercised (in shares) | 750 |  |  |
Cash paid to settle stock appreciation rights | $ 100 |  |  |
Canceled (in shares) | 2,500 |  |  |
Outstanding (in shares) | 38,795 |  |  |

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