Pension Plans (Change In Benefit Obligation And Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions	$ 2,000	$ 2,000	$ 46,700
Unrecognized actuarial loss	(24,700)	(38,700)
Pension Plan [Member] | Domestic Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Service cost	0	0	0
Interest cost	0	0	4,591
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions			25,500
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation—beginning of year	92,695	78,188
Service cost	1,696	1,599	1,466
Interest cost	815	1,374	1,828
Actuarial loss	(8,496)	10,556
Foreign exchange impact	2,379	2,431
Participant contributions	183	147
Benefits paid	(2,104)	(1,600)
Settlements	0	0
Projected benefit obligation—end of year	87,168	92,695	78,188
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value-beginning of year	61,935	57,961
Actual return on plan assets	6,261	1,742
Employer contributions	2,036	1,978
Participant contributions	183	147
Foreign exchange impact	2,183	1,707
Settlements	0	0
Benefits paid	(2,104)	(1,600)
Plan assets at fair value-end of year	70,494	61,935	$ 57,961
Underfunded status	(16,674)	(30,760)
Accumulated benefit obligation-end of year	84,298	88,768
Non-current liability	(16,674)	(30,760)
Liability, Defined Benefit Plan, Current	0	0
Unrecognized actuarial loss	$ (24,738)	$ (38,667)