Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 766,341
Balance at end of the period	2,136,342	$ 766,341
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(24,329)	(22,126)	$ (14,668)
Other comprehensive gain/(loss) before reclassifications	12,381	(6,489)	(13,703)
Amounts reclassified from AOCI	931	4,286	6,245
Balance at end of the period	(11,017)	(24,329)	(22,126)
Unrealized Gain/(Loss) on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	139	(78)	71
Other comprehensive gain/(loss) before reclassifications	(590)	217	(149)
Amounts reclassified from AOCI	0	0	0
Balance at end of the period	(451)	139	(78)
Unrealized Gain/Losses on Derivative Instruments | Foreign Exchange Forward
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(1,091)	(268)	(173)
Other comprehensive gain/(loss) before reclassifications	1,290	(1,453)	(5,547)
Amounts reclassified from AOCI	(1,585)	630	5,452
Balance at end of the period	(1,386)	(1,091)	(268)
Unrealized Gain/Losses on Derivative Instruments | Interest Rate Swap
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(5,967)	(5,522)	(2,083)
Other comprehensive gain/(loss) before reclassifications	3,669	(4,101)	(4,232)
Amounts reclassified from AOCI	2,516	3,656	793
Balance at end of the period	218	(5,967)	(5,522)
Cumulative Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(17,410)	(16,258)	(12,483)
Other comprehensive gain/(loss) before reclassifications	8,012	(1,152)	(3,775)
Amounts reclassified from AOCI	0	0	0
Balance at end of the period	$ (9,398)	$ (17,410)	$ (16,258)