Pension Plans (Change In Benefit Obligation And Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value-beginning of year	$ 70,141
Actual return on plan assets	3,500	$ 1,000	$ 6,300
Employer contributions	2,600	2,500	2,000
Plan assets at fair value-end of year	69,879	70,141
Unrecognized actuarial loss	34,900	(27,000)
Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation—beginning of year	87,864	87,168
Service cost	1,372	1,535	1,696
Interest cost	1,199	1,260	815
Actuarial loss	12,059	2,157
Foreign exchange impact	(4,674)	(1,669)
Participant contributions	154	212
Benefits paid	(1,836)	(1,637)
Settlements	(1,155)	(1,162)
Projected benefit obligation—end of year	94,983	87,864	87,168
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value-beginning of year	70,141	70,494
Actual return on plan assets	3,512	1,025
Employer contributions	2,576	2,459
Participant contributions	154	212
Foreign exchange impact	(3,513)	(1,250)
Settlements	(1,155)	(1,162)
Benefits paid	(1,836)	(1,637)
Plan assets at fair value-end of year	69,879	70,141	$ 70,494
Underfunded status	(25,104)	(17,723)
Accumulated benefit obligation-end of year	92,280	85,103
Non-current liability	(24,868)	(17,502)
Liability, Defined Benefit Plan, Current	(236)	(221)
Unrecognized actuarial loss	$ 34,920	$ 27,027