Consolidated Statements of Comprehensive Earnings (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Comprehensive earnings
Net earnings	$ 145,942	$ 141,589	$ 132,235
Other comprehensive earnings:
Foreign currency translation adjustments	7,337	(7,291)	(2,653)
Taxes on changes on foreign currency translation adjustments	958	2,635	1,604
Foreign currency translation adjustments, net of tax	8,295	(4,656)	(1,049)
Reclassification of realized losses on derivatives to earnings	171	174	229
Realized gain on cash flow hedge	507	0	0
Taxes on changes on derivative transactions	(259)	(66)	(86)
Derivative adjustments, net of tax	419	108	143
Minimum retirement benefit liability adjustments:
Net gain (loss) arising during the period	26,756	(17,960)	(3,088)
Loss due to settlement arising during the period	36	56	0
Amortization of prior service benefit (cost)	(90)	(484)	(805)
Amortization of net (gains) losses	1,770	1,280	1,339
Foreign currency exchange rate changes on minimum retirement benefit liabilities	673	(171)	(376)
Taxes on changes on minimum retirement benefit liability adjustments	(11,021)	6,478	1,120
Minimum retirement benefit liability adjustments, net of tax	18,124	(10,801)	(1,810)
Total comprehensive earnings	$ 172,780	$ 126,240	$ 129,519