Property and Equipment, Net - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands  | 
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Mar. 31, 2025  | 
Mar. 31, 2025  | 
Mar. 31, 2024  | 
|
| Property, Plant and Equipment [Abstract] | |||
| Loss on disposal of long-lived assets | $ 780 | $ 938 | |
| Impairment of long-lived assets | $ 24,966 | 24,966 | $ 0 | 
| Accelerated depreciation | 119,266 | ||
| Impact on accelerated depreciation on net income, amount | $ (96,128) | $ (96,128) | |
| Impact of accelerated depreciation, earnings per share, basic (in dollars per share) | $ (12.59) | $ (12.59) | |
| Impact of accelerated depreciation, earnings per share, diluted (in dollars per share) | $ (12.59) | $ (12.59) | |
| X | ||||||||||
- Definition Impact of Accelerated Depreciation, Earnings Per Share, Basic No definition available. 
  | 
| X | ||||||||||
- Definition Impact of Accelerated Depreciation, Earnings Per Share, Diluted No definition available. 
  | 
| X | ||||||||||
- Definition Impact of Accelerated Depreciation on Net Income, Amount No definition available. 
  | 
| X | ||||||||||
- Definition Impairment of Long-Lived Assets to be Disposed of, Loss No definition available. 
  | 
| X | ||||||||||
- References No definition available. 
  | 
| X | ||||||||||
- Definition Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan. No definition available. 
  | 
| X | ||||||||||
- Definition The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  |