Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 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	1,756,140
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	13,044	5,316
Amounts reclassified from AOCI	348	842
Accumulated other comprehensive income - ending balance	2,375	(18,171)
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	(261)	(249)
Amounts reclassified from AOCI	0	0
Accumulated other comprehensive income - ending balance	(712)	(110)
Unrealized gain/(loss) on 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	1,624	1,031
Amounts reclassified from AOCI	(71)	394
Accumulated other comprehensive income - ending balance	167	334
Unrealized gain/(loss) on 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	3,479	4,044
Amounts reclassified from AOCI	419	448
Accumulated other comprehensive income - ending balance	4,116	(1,475)
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	8,202	490
Amounts reclassified from AOCI	0	0
Accumulated other comprehensive income - ending balance	$ (1,196)	$ (16,920)