Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Comprehensive earnings
Net earnings	$ 18,260	$ 46,548
Other comprehensive earnings:
Foreign currency translation adjustments	5,103	(18,635)
Net gain (loss) on foreign currency transactions designated as hedges of net investments in a foreign subsidiaries	(743)	3,830
Taxes on changes in foreign currency translation adjustments	187	(306)
Foreign currency translation and transactions adjustments, net of tax	4,547	(15,111)
Reclassification of net realized (gains) losses on derivatives to earnings	(18)	(18)
Taxes on changes in derivative transactions	7	7
Derivative adjustments, net of tax	(11)	(11)
Minimum retirement benefit liability adjustments:
Loss (gain) due to settlement or curtailment arising during the period	59	0
Amortization of net prior service cost (benefit)	137	56
Amortization of net loss	246	641
Foreign currency exchange rate changes on pension and other postretirement benefit plan liabilities	(99)	1,255
Taxes on changes in pension and other postretirement benefit plan liability, net of foreign currency exchange rate changes	(132)	(693)
Pension and other postretirement benefit plan adjustments, net of tax	211	1,259
Total comprehensive earnings	$ 23,007	$ 32,685