Income Tax Expense (Tax Effects Of Temporary Differences That Give Rise To Significant Portions Of The Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Deferred tax assets:
Inventories	$ 4,267	$ 5,007
Pension and other postretirement benefits	859	842
Timing differences related to revenue recognition	9,365	4,936
Lease liabilities	7,614	5,220
Net operating and capital loss carryforwards-domestic	542	563
Net operating loss carryforward - foreign	4,279	3,678
Other compensation-related costs and other cost accruals	8,174	8,953
State credit carryforward	2,639	2,366
Foreign credit carryforward	192	0
Total deferred tax assets	37,931	31,565
Deferred tax liabilities:
ROU assets	(7,614)	(5,220)
Goodwill	(13,746)	(7,878)
Acquisition intangible assets	(62,052)	(52,682)
Depreciation, software amortization	(22,418)	(21,283)
Net deferred tax liabilities before valuation allowance	(67,899)	(55,498)
Less valuation allowance	(2,011)	(1,932)
Net deferred tax liabilities	$ (69,910)	$ (57,430)