Income Taxes (Components of Deferred Income Taxes) (Details) - USD ($)	Oct. 31, 2020	Oct. 31, 2019
Deferred tax assets:
Lease liability	$ 74,831,000	$ 0
Stock-based compensation	23,926,000	45,505,000
Investment basis in partnerships	0	25,245,000
Deferred rent	0	8,017,000
Differences between book and tax bases of investments	33,922,000	7,893,000
Differences between book and tax bases of goodwill and intangibles	9,832,000	0
Compensation and benefit expense	5,741,000	5,259,000
Federal benefit of unrecognized state tax benefits	352,000	282,000
Other	0	193,000
Total deferred tax asset	148,604,000	92,394,000
Valuation allowance	(18,166,000)	0
Total deferred tax asset	130,438,000	92,394,000
Deferred tax liabilities:
ROU Asset	(63,073,000)	0
Deferred sales commissions	(15,510,000)	(14,189,000)
Differences between book and tax bases of property	(13,292,000)	(7,270,000)
Differences between book and tax bases of goodwill and intangibles	0	(8,218,000)
Investment basis in partnerships	(4,659,000)	0
Unrealized gains on derivative instruments	0	(56,000)
Other	(481,000)	0
Total deferred tax liability	(97,015,000)	(29,733,000)
Net deferred tax asset	$ 33,423,000	$ 62,661,000