Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 61,398	$ 70,476	$ 199,937	$ 206,244
Other comprehensive income (loss), net of tax:
Hedge gain (loss) arising during the period, net of tax of $0 million and $1.9 million in the third quarter of 2023 and 2022, respectively, and $0 million and $4 million in the first nine months of 2023 and 2022, respectively	(521)	5,880	(14,005)	12,072
Foreign currency translation adjustment, net of tax of $0 for each period	1,405	(35,795)	70,181	(52,819)
Amortization of net actuarial pension loss included in net income, net of tax of $0 million and $0 million in the third quarter of 2023 and 2022, respectively, and $0 million and $0.2 million in the first nine months of 2023 and 2022, respectively	43	(78)	125	447
Change in unamortized pension loss during the period related to changes in foreign currency	(67)	1,354	(481)	2,277
Other comprehensive income (loss)	860	(28,639)	55,820	(38,023)
Comprehensive income	$ 62,258	$ 41,837	$ 255,757	$ 168,221