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Condensed Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Condensed Consolidated Statements of Comprehensive Earnings
Net earnings	$ 77,579	$ 38,489	$ 126,699	$ 56,749
Other comprehensive earnings:
Foreign currency translation adjustments	323	9,584	(1,411)	14,687
Net (loss) gain on foreign currency transactions designated as hedges of net investments in foreign subsidiaries (Note 8)	925	(1,268)	1,574	(2,011)
Taxes on changes in foreign currency translation adjustments	(280)	(450)	103	(263)
Foreign currency translation and transactions adjustments, net of tax	968	7,866	266	12,413
Unrealized gain on fair value adjustment of derivative instruments (Note 8)	9,609		28,172
Reclassification of net realized gains on derivatives to earnings (Note 8)	(10,895)	(18)	(18,721)	(36)
Taxes on changes in derivative transactions	32	6	(176)	13
Derivative adjustments, net of tax	(1,254)	(12)	9,275	(23)
Curtailment of postretirement benefit plan arising during the period				59
Amortization of pension and other postretirement plan:
Net prior service cost	176	139	352	276
Net loss	242	248	481	494
Foreign currency exchange rate changes on pension and other postretirement benefit plan liabilities	(301)	(583)	2	(682)
Taxes on changes in pension and other postretirement benefit plan liability adjustments, net of foreign currency exchange rate changes	6	60	(203)	(72)
Pension and other postretirement benefit plan adjustments, net of tax	123	(136)	632	75
Total comprehensive earnings	$ 77,416	$ 46,207	$ 136,872	$ 69,214

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