Condensed Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Comprehensive Earnings
Net earnings	$ 47,906	$ 68,313	$ 78,211	$ 109,883
Other comprehensive earnings:
Foreign currency translation adjustments	(4,621)	(8,789)	(7,059)	8,539
Net gain (loss) on foreign currency transactions designated as hedges of net investments in foreign subsidiaries	673	(2,329)	1,744	(102)
Taxes on changes in foreign currency translation adjustments	(463)	(2,555)	(1,449)	(871)
Foreign currency translation and transactions adjustments, net of tax	(4,411)	(13,673)	(6,764)	7,566
Unrealized gain/(loss) on fair value adjustment of derivative instruments	12,411	8,892	24,780	(21,766)
Reclassification of net realized (gain)/loss on derivatives to earnings	(6,256)	(20,683)	(16,331)	277
Taxes on changes in derivative transactions	(215)	1,543	(295)	203
Derivative adjustments, net of tax	5,940	(10,248)	8,154	(21,286)
Amortization of pension and other postretirement plan:
Net prior service cost	251	250	502	498
Net loss	187	377	374	747
Foreign currency exchange rate changes on pension and other postretirement benefit plan liabilities	592	453	622	(1,244)
Taxes on changes in pension and other postretirement benefit plan liability adjustments, net of foreign currency exchange rate changes	(292)	(284)	(406)	72
Pension and other postretirement benefit plan adjustments, net of tax	738	796	1,092	73
Total comprehensive earnings	$ 50,173	$ 45,188	$ 80,693	$ 96,236