Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statements of Comprehensive Earnings
Net earnings	$ 208,649	$ 240,395	$ 259,602
Other comprehensive earnings:
Foreign currency translation adjustments	8,628	15,668	(16,554)
Net gain (loss) on foreign currency transactions designated as hedges of net investments in foreign subsidiaries	592	(3,199)	2,682
Taxes on changes on foreign currency translation adjustments	(1,433)	75	476
Foreign currency translation and transactions adjustments, net of tax	7,787	12,544	(13,396)
Unrealized (loss) gain on fair value adjustment of derivative instruments	(1,672)	(18,262)	47,759
Reclassification of net realized (gains) losses on derivatives to earnings	3,702	(2,134)	31,446
Taxes on changes on derivative transactions	234	626	(326)
Derivative adjustments, net of tax	(5,140)	(15,502)	15,987
Minimum retirement benefit liability adjustments:
Net gain (loss) arising during the period	27,809	20,179	(43,817)
Prior service cost arising during the period	(611)		(601)
Amortization of:
Prior service cost	995	962	704
Net loss	1,502	2,523	955
Foreign currency exchange rate changes on minimum retirement benefit liabilities	(855)	(1,672)	1,318
Taxes on changes on minimum retirement benefit liability adjustments	(7,312)	(5,522)	10,531
Pension and other postretirement benefit plan adjustments, net of tax	21,528	16,470	(30,910)
Total comprehensive earnings	$ 232,824	$ 253,907	$ 231,283