Accumulated Other Comprehensive Loss Amounts Recognized Into Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Oct. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance		$ 199,738	$ 199,522	$ 188,321	$ 188,321
Ending Balance	$ 191,121	209,082	191,121	209,082	199,522
Tax Cuts And Jobs Act of 2017 - ReclassificationFromAociToRetainedEarningsTaxEffect				0	0
Pension and Post Retirement Plan Liability [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(28,693)		(29,137)
Other comprehensive income (loss)	0		0
Amounts reclassified from accumulated other comprehensive loss, net of tax	223		667
Net current-period other comprehensive income (loss)	223		667
Ending Balance	(28,470)		(28,470)		(29,137)
Tax Cuts And Jobs Act of 2017 - ReclassificationFromAociToRetainedEarningsTaxEffect				(6,138)
Marketable Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0		(18)
Other comprehensive income (loss)	0		0	(113)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		18
Net current-period other comprehensive income (loss)	0		18	9
Ending Balance	0		0		(18)
Tax Cuts And Jobs Act of 2017 - ReclassificationFromAociToRetainedEarningsTaxEffect				(7)
Interest Rate Swap Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(358)	(121)	104
Other comprehensive income (loss)	(243)	95	(835)
Amounts reclassified from accumulated other comprehensive loss, net of tax	51		181	648
Net current-period other comprehensive income (loss)	(192)		(654)
Ending Balance	(550)		(550)		104
Tax Cuts And Jobs Act of 2017 - ReclassificationFromAociToRetainedEarningsTaxEffect				(213)
Accumulated Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(23,652)		(21,879)
Other comprehensive income (loss)	(1,940)		(3,713)	(2,953)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0		0
Net current-period other comprehensive income (loss)	(1,940)		(3,713)
Ending Balance	(25,592)		(25,592)		(21,879)
Tax Cuts And Jobs Act of 2017 - ReclassificationFromAociToRetainedEarningsTaxEffect				0
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(52,703)	(40,779)	(50,930)	(42,237)	(42,237)
Other comprehensive income (loss)	(2,183)		(4,548)
Amounts reclassified from accumulated other comprehensive loss, net of tax	274		866
Net current-period other comprehensive income (loss)	(1,909)		(3,682)	(772)
Ending Balance	$ (54,612)	$ (49,367)	$ (54,612)	(49,367)	(50,930)
Tax Cuts And Jobs Act of 2017 - ReclassificationFromAociToRetainedEarningsTaxEffect				$ (6,358)	$ (6,358)