Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Effect of Changes in Contract Estimates (Details)

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Revenue Recognition - Effect of Changes in Contract Estimates (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]        
Benefit to/(reduction of) revenue recognized due to changes in contract estimates $ 1,348,357 $ 1,206,852 $ 2,675,398 $ 2,456,098
Benefit to/(reduction of) diluted earnings per share recognized due to changes in contract estimates (in dollars per share) $ 1.31 $ 0.52 $ 2.35 $ 1.17
Change in contract estimates        
Disaggregation of Revenue [Line Items]        
Benefit to/(reduction of) revenue recognized due to changes in contract estimates $ (3,098) $ (6,496) $ (9,196) $ (6,137)
Benefit to/(reduction of) diluted earnings per share recognized due to changes in contract estimates (in dollars per share) $ (0.04) $ (0.08) $ (0.11) $ (0.07)