Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income - beginning balance	$ 2,136,342
Accumulated other comprehensive income - ending balance	1,744,119
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income - beginning balance	(11,017)	$ (24,329)
Other comprehensive income (loss) before reclassifications	5,017	1,328
Amounts reclassified from AOCI	928	1,815
Accumulated other comprehensive income - ending balance	(5,072)	(21,186)
Unrealized Gain/(Loss) on Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income - beginning balance	(451)	139
Other comprehensive income (loss) before reclassifications	(337)	(527)
Amounts reclassified from AOCI	0	0
Accumulated other comprehensive income - ending balance	(788)	(388)
Unrealized Gain (Loss) Derivatives | Foreign Currency Contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income - beginning balance	(1,386)	(1,091)
Other comprehensive income (loss) before reclassifications	4,725	52
Amounts reclassified from AOCI	523	474
Accumulated other comprehensive income - ending balance	(1,421)	(565)
Unrealized Gain (Loss) Derivatives | Starting Interest Rate Swap
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income - beginning balance	218	(5,967)
Other comprehensive income (loss) before reclassifications	(440)	3,556
Amounts reclassified from AOCI	405	1,341
Accumulated other comprehensive income - ending balance	5,466	(1,070)
Cumulative Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income - beginning balance	(9,398)	(17,410)
Other comprehensive income (loss) before reclassifications	1,069	(1,753)
Amounts reclassified from AOCI	0	0
Accumulated other comprehensive income - ending balance	$ (8,329)	$ (19,163)