Pension Plans (Change In Benefit Obligation And Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Employer contributions	$ 2,500	$ 2,000	$ 2,000
Unrecognized actuarial loss	(27,000)	(24,700)
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation—beginning of year	87,168	92,695
Service cost	1,535	1,696	1,599
Interest cost	1,260	815	1,374
Actuarial loss	2,157	(8,496)
Foreign exchange impact	(1,669)	2,379
Participant contributions	212	183
Benefits paid	(1,637)	(2,104)
Settlements	(1,162)	0
Projected benefit obligation—end of year	87,864	87,168	92,695
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value-beginning of year	70,494	61,935
Actual return on plan assets	1,025	6,261
Employer contributions	2,459	2,036
Participant contributions	212	183
Foreign exchange impact	(1,250)	2,183
Settlements	(1,162)	0
Benefits paid	(1,637)	(2,104)
Plan assets at fair value-end of year	70,141	70,494	$ 61,935
Underfunded status	(17,723)	(16,674)
Accumulated benefit obligation-end of year	85,103	84,298
Non-current liability	(17,502)	(16,674)
Liability, Defined Benefit Plan, Current	(221)	0
Unrecognized actuarial loss	$ (27,027)	$ (24,738)