Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 204,099	$ 170,400
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of income tax expense (benefit) of $496 and ($3,013) for the three months ended March 31, 2025 and 2024	13,683	(15,525)
Other comprehensive income (loss)	13,683	(15,525)
Comprehensive income	217,782	154,875
Less comprehensive income (loss) attributable to the noncontrolling interest	286	1,140
Comprehensive income attributable to shareholders	$ 217,496	$ 153,735