Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,			$ (57,583)
Other comprehensive income (loss), net of tax	$ (8,609)	$ 22,450	(2,481)	$ 7,730
Ending balance,	(60,064)		(60,064)
Unamortized net gains (losses) on derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	691	677	687	674
Other comprehensive income (loss) before reclassifications and tax	(684)	0	(684)	0
Tax impact	271	0	271	0
Reclassification adjustments, before tax	8	6	14	11
Tax impact	(3)	(2)	(5)	(4)
Other comprehensive income (loss), net of tax	(408)	4	(404)	7
Ending balance,	283	681	283	681
Net unrealized holding gains (losses) on available-for-sale investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	3,270	3,075	2,943	3,733
Other comprehensive income (loss) before reclassifications and tax	532	1,058	1,068	(23)
Tax impact	(207)	(415)	(416)	12
Reclassification adjustments, before tax	0	(63)	0	(83)
Tax impact	0	25	0	41
Other comprehensive income (loss), net of tax	325	605	652	(53)
Ending balance,	3,595	3,680	3,595	3,680
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	(55,416)	(67,058)	(61,213)	(52,993)
Other comprehensive income (loss) before reclassifications and tax	(8,526)	21,841	(2,729)	7,776
Tax impact	0	0	0	0
Reclassification adjustments, before tax	0	0	0	0
Tax impact	0	0	0	0
Other comprehensive income (loss), net of tax	(8,526)	21,841	(2,729)	7,776
Ending balance,	(63,942)	(45,217)	(63,942)	(45,217)
Total [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance,	(51,455)	(63,306)	(57,583)	(48,586)
Other comprehensive income (loss) before reclassifications and tax	(8,678)	22,899	(2,345)	7,753
Tax impact	64	(415)	(145)	12
Reclassification adjustments, before tax	8	(57)	14	(72)
Tax impact	(3)	23	(5)	37
Other comprehensive income (loss), net of tax	(8,609)	22,450	(2,481)	7,730
Ending balance,	$ (60,064)	$ (40,856)	$ (60,064)	$ (40,856)