v3.26.1
Stock-Based Compensation - SARs Outstanding and the Changes (Details)
$ / shares in Units, $ in Millions
 6 Months Ended
Mar. 31, 2026
USD ($)
$ / shares
shares
Additional Disclosures  
Weighted Average Remaining Contractual Term 2 years 1 month 6 days
Stock Appreciation Rights (SARs)  
SARs (in thousands)  
Outstanding, Beginning Balance (in shares) | shares 1,443,300
Forfeited, canceled or expired (in shares) | shares (17,800)
Outstanding, Ending Balance (in shares) | shares 1,425,500
Vested and expected to vest (in shares) | shares 1,423,700
Exercisable (in shares) | shares 1,392,500
Weighted Average Exercise Price  
Outstanding, Beginning Balance (in dollars per share) | $ / shares $ 29.23
Forfeited, canceled or expired (in dollars per share) | $ / shares 16.97
Outstanding, Ending Balance (in dollars per share) | $ / shares 29.39
Vested and expected to vest, Weighted Average Exercise Price (in dollars per share) | $ / shares 29.39
Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares $ 29.34
Additional Disclosures  
Weighted Average Remaining Contractual Term 5 years 4 months 24 days
Vested and expected to vest, Weighted Average Remaining Contractual Term 5 years 4 months 24 days
Exercisable, Weighted Average Remaining Contractual Term 5 years 3 months 18 days
Outstanding, Aggregate Intrinsic Value | $ $ 0.0
Vested and expected to vest, Aggregate Intrinsic Value | $ 0.0
Exercisable, Aggregate Intrinsic Value | $ $ 0.0