Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Consolidated Statements of Comprehensive Earnings
Net earnings	$ 171,698	$ 208,649	$ 240,395
Other comprehensive earnings:
Foreign currency translation adjustments	(63,026)	8,628	15,668
Net gain (loss) on foreign currency transactions designated as hedges of net investments in foreign subsidiaries	7,206	592	(3,199)
Taxes on changes on foreign currency translation adjustments	2,230	(1,433)	75
Foreign currency translation and transactions adjustments, net of tax	(53,590)	7,787	12,544
Unrealized gain (loss) on fair value adjustment of derivative instruments	89,048	(1,672)	(18,262)
Reclassification of net realized (gains) losses on derivatives to earnings	(68,880)	(3,702)	2,134
Taxes on changes on derivative transactions	(786)	234	626
Derivative adjustments, net of tax	19,382	(5,140)	(15,502)
Minimum retirement benefit liability adjustments:
Net gain arising during the period	6,318	27,809	20,179
Prior service cost arising during the period		(611)
Amortization of:
Prior service cost	1,004	995	962
Net loss	720	1,502	2,523
Foreign currency exchange rate changes on minimum retirement benefit liabilities	1,158	(855)	(1,672)
Taxes on changes on minimum retirement benefit liability adjustments	(1,936)	(7,312)	(5,522)
Pension and other postretirement benefit plan adjustments, net of tax	7,264	21,528	16,470
Total comprehensive earnings	$ 144,754	$ 232,824	$ 253,907