v3.26.1
Stockholders' Equity (Stock Options Vested, or Expected to Vest and Exercisable) (Details) - Stock Options [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Options outstanding, Number of options 1,515 1,671 2,249
Options vested and exercisable, Number of options 1,304    
Options vested and expected to vest, Number of options 1,509    
Options outstanding, Weighted-Average Exercise Price $ 97.53 $ 97.33 $ 91.25
Options vested and exercisable, Weighted-Average Exercise Price Per Share 91.73    
Options vested and expected to vest, Weighted-Average Exercise Price Per Share $ 97.06    
Options outstanding, Weighted-Average Remaining Life in Years 4 years 7 months 6 days    
Options vested and exercisable, Weighted-Average Remaining Life in Years 4 years 2 months 12 days    
Options vested and expected to vest, Weighted-Average Remaining Life in Years 4 years 7 months 6 days    
Options outstanding, Aggregate Intrinsic Value $ 497,030    
Options vested and exercisable, Aggregate Intrinsic Value 435,081    
Options vested and expected to vest, Aggregate Intrinsic Value $ 495,621