Income Taxes - Components of Net Deferred Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012
Income Tax Disclosure [Abstract]
Allowance for doubtful accounts	$ 8,082	$ 7,532
Unrealized gains and losses	15,342	5,541
Tax loss carry forwards	385,375	342,529
Accruals and other	82,768	79,090
Deferred income tax assets	491,567	434,692
Depreciation and amortization	(15,155)	(12,923)
Intangibles	(27,244)	(25,705)
Deferred income tax liabilities	(42,399)	(38,628)
Deferred income taxes	449,168	396,064
Valuation allowance	(459,068)	(254,490)
Net deferred income taxes	$ (9,900)	$ 141,574