Condensed Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Comprehensive earnings
Net earnings	$ 44,798	$ 42,446	$ 68,181	$ 69,814
Other comprehensive earnings:
Foreign currency translation adjustments	(243)	(10,509)	4,231	(6,058)
Taxes on changes in foreign currency translation adjustments	(139)	(193)	294	419
Foreign currency translation adjustments, net of tax	(382)	(10,702)	4,525	(5,639)
Reclassification of net realized losses on derivatives to earnings	24	43	49	86
Taxes on changes in derivative transactions	(9)	(16)	(18)	(33)
Derivative adjustments, net of tax	15	27	31	53
Minimum retirement benefit liability adjustments (Note 18):
Amortization of prior service benefit	(22)	(23)	(44)	(46)
Amortization of net loss	195	441	389	892
Foreign currency exchange rate changes on minimum retirement benefit liabilities	(124)	1,242	(220)	1,185
Taxes on changes in minimum retirement benefit liability adjustments	(18)	(591)	(45)	(725)
Minimum retirement benefit liability adjustments, net of tax	31	1,069	80	1,306
Total comprehensive earnings	$ 44,462	$ 32,840	$ 72,817	$ 65,534