XML 109 R92.htm IDEA: XBRL DOCUMENT v3.21.2
Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Income Tax Disclosure [Abstract]      
Tax at statutory rate $ 172,053 $ 156,827 $ 136,565
Common stock dividends deductible for tax reporting (1,372) (1,419) (1,460)
State taxes (net of federal benefit) 19,647 22,791 20,202
Amortization of excess deferred taxes (45,382) (16,125) (14,085)
Remeasurement due to state deferred tax rate change 0 20,962 0
Other, net 8,790 4,241 (2,319)
Income tax expense (benefit) $ 153,736 $ 145,353 $ 138,903
Statutory federal income tax rate 21.00%