Retirement Benefits (Schedule of Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 198,476	$ 163,696
Service cost	5,660	4,666	4,425
Interest cost	7,682	8,096	7,930
Net actuarial (gains) losses	(12,615)	26,325
Contribution by participants	253	249
Benefits paid	(5,736)	(5,262)
Amounts paid by Company for Pension Protection Fund levy	(2)	(20)
Settlements	(406)	(330)
Curtailments	(271)	0
Foreign currency exchange rate changes	(2,618)	1,056
Projected benefit obligation at end of year	190,423	198,476	163,696
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	161,503	138,347
Actual return on plan assets	17,162	23,369
Contributions by the company	19,237	3,959
Contributions by plan participants	253	249
Benefits paid	(5,736)	(5,262)
Settlements	(406)	(330)
Foreign currency exchange rate changes	(1,838)	1,171
Fair value of plan assets at end of year	190,175	161,503	138,347
Net underfunded status at end of year	(248)	(36,973)
United States Pension Plans of US Entity, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	137,639	106,341
Service cost	4,608	3,530	3,433
Interest cost	5,569	5,816	5,646
Net actuarial (gains) losses	(18,165)	24,689
Contribution by participants	12	0
Benefits paid	(3,131)	(2,737)
Amounts paid by Company for Pension Protection Fund levy	0	0
Settlements	0	0
Curtailments	0	0
Foreign currency exchange rate changes	0	0
Projected benefit obligation at end of year	126,532	137,639	106,341
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	105,966	89,980
Actual return on plan assets	10,621	18,123
Contributions by the company	16,050	600
Contributions by plan participants	12	0
Benefits paid	(3,131)	(2,737)
Settlements	0	0
Foreign currency exchange rate changes	0	0
Fair value of plan assets at end of year	129,518	105,966	89,980
Net underfunded status at end of year	2,986	(31,673)
Foreign Pension Plans, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	60,837	57,355
Service cost	1,052	1,136	992
Interest cost	2,113	2,280	2,284
Net actuarial (gains) losses	5,550	1,636
Contribution by participants	241	249
Benefits paid	(2,605)	(2,525)
Amounts paid by Company for Pension Protection Fund levy	(2)	(20)
Settlements	(406)	(330)
Curtailments	(271)	0
Foreign currency exchange rate changes	(2,618)	1,056
Projected benefit obligation at end of year	63,891	60,837	57,355
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	55,537	48,367
Actual return on plan assets	6,541	5,246
Contributions by the company	3,187	3,359
Contributions by plan participants	241	249
Benefits paid	(2,605)	(2,525)
Settlements	(406)	(330)
Foreign currency exchange rate changes	(1,838)	1,171
Fair value of plan assets at end of year	60,657	55,537	48,367
Net underfunded status at end of year	(3,234)	(5,300)
United Kingdom Plan, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at end of year	49,027
Changes in fair value of plan assets:
Fair value of plan assets at end of year	48,381
Japan Plan, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at end of year	11,824
Changes in fair value of plan assets:
Fair value of plan assets at end of year	10,300
Switzerland Plan, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at end of year	3,040
Changes in fair value of plan assets:
Fair value of plan assets at end of year	1,976
Other Postretirement Benefit Plans, Defined Benefit [Member]
Changes in projected benefit obligation:
Projected benefit obligation at beginning of year	37,550	32,923
Service cost	71	70	92
Interest cost	1,244	1,798	1,974
Net actuarial (gains) losses	(7,501)	5,412
Contribution by participants	1,837	2,176
Benefits paid	(4,206)	(4,846)
Foreign currency exchange rate changes	1	17
Projected benefit obligation at end of year	28,996	37,550	32,923
Changes in fair value of plan assets:
Fair value of plan assets at beginning of year	0	0
Contributions by the company	2,369	2,670
Contributions by plan participants	1,837	2,176
Benefits paid	(4,206)	(4,846)
Fair value of plan assets at end of year	0	0	0
Net underfunded status at end of year	$ (28,996)	$ (37,550)