CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 122,490	$ 131,319
Other comprehensive income
Reclassifications of losses to net income on derivatives designated as hedging instruments, net of tax of $(79) and $(79), respectively	264	263
Adjustment to postemployment benefit obligation, net of tax of $1 and $58, respectively	(6)	(195)
Other comprehensive income	258	68
Comprehensive income	$ 122,748	$ 131,387