Condensed Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Comprehensive earnings
Net earnings	$ 46,001	$ 23,663	$ 114,182	$ 93,477
Other comprehensive earnings:
Foreign currency translation adjustments	(72)	1,056	4,159	(5,002)
Taxes on changes in foreign currency translation adjustments	74	387	368	806
Foreign currency translation adjustments, net of tax	2	1,443	4,527	(4,196)
Reclassification of net realized losses on derivatives to earnings	24	42	73	128
Unrealized gain on derivatives arising during the period	0	546	0	546
Taxes on changes in derivative transactions	(9)	(223)	(27)	(256)
Derivative adjustments, net of tax	15	365	46	418
Minimum retirement benefit liability adjustments (Note 18):
Net gain (loss) arising during the period	1,193	0	1,193	0
Curtailment arising during the period	(915)	0	(915)	0
Amortization of net prior service benefit	(22)	(23)	(66)	(69)
Amortization of net loss	199	440	588	1,332
Foreign currency exchange rate changes on minimum retirement benefit liabilities	(263)	170	(483)	1,355
Taxes on changes in minimum retirement benefit liability adjustments	31	(214)	(14)	(939)
Minimum retirement benefit liability adjustments, net of tax	223	373	303	1,679
Total comprehensive earnings	$ 46,241	$ 25,844	$ 119,058	$ 91,378