UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 95,173	$ 97,145
Other comprehensive income, net of income taxes:
Net change related to employee benefit plans, net of income taxes of $(39.5) thousand and $(75.1) thousand for the three months ended December 31, 2023 and 2022, respectively	134	256
Other comprehensive income	134	256
Comprehensive income	$ 95,307	$ 97,401