Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Voting Common Stock [Member]	Non-Voting Common Stock [Member]	Additional Paid-In Capital [Member]	Notes Receivable From Stock Option Exercises [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Appropriated Retained Earnings (Deficit) [Member]	Retained Earnings [Member]	Non Redeemable Non Controlling Interests [Member]	Total Permanent Equity [Member]	Redeemable Non Controlling Interests [Member]
Beginning balance, at Oct. 31, 2010		$ 2	$ 461	$ 50,225	$ (3,158)	$ (435)		$ 363,190	$ 570	$ 410,855	$ 67,019
Cumulative effect of adoption of new accounting principle							30,666	1,665		32,331
Net income	113,050						(18,630)	100,014	1,264	82,648	30,402
Other comprehensive income						3,050				3,050
Dividends declared								(42,795)		(42,795)
Issuance of Non-Voting Common Stock:
On exercise of stock options			5	23,068	(490)					22,583
Under employee stock purchase plan				1,876						1,876
Under employee incentive plan				2,567						2,567
Under restricted stock plan, net of forfeitures			4							4
Stock-based compensation				27,529						27,529
Tax benefit of stock option exercises				3,331						3,331
Repurchase of Non-Voting Common Stock	65,819		(8)	(65,811)						(65,819)
Principal repayments on notes receivable from stock option exercises					780					780
Net subscriptions (redemptions/distributions) of non-controlling interest holders									(855)	(855)	94,572
Deconsolidation											(74,708)
Reclass to temporary equity									(66)	(66)	66
Other changes in non-controlling interests				(850)						(850)	850
Ending balance, at Apr. 30, 2011		2	462	41,935	(2,868)	2,615	12,036	422,074	913	477,169	118,201
Beginning balance, at Oct. 31, 2011	461,304	2	450		(4,441)	1,340	(3,867)	466,931	889	461,304	100,824
Net income	127,640						8,861	100,141	1,776	110,778	16,862
Other comprehensive income						1,757				1,757
Dividends declared								(43,991)		(43,991)
Issuance of Voting Common Stock				56						56
Issuance of Non-Voting Common Stock:
On exercise of stock options			2	8,458	(211)					8,249
Under employee stock purchase plan			1	1,823						1,824
Under employee incentive plan				1,609						1,609
Under restricted stock plan, net of forfeitures			5							5
Stock-based compensation				29,320						29,320
Tax benefit of stock option exercises				1,162						1,162
Repurchase of Non-Voting Common Stock	51,669		(8)	(39,556)				(12,105)		(51,669)
Principal repayments on notes receivable from stock option exercises					481					481
Net subscriptions (redemptions/distributions) of non-controlling interest holders									(1,436)	(1,436)	20,102
Deconsolidation											(6,276)
Reclass to temporary equity									(132)	(132)	132
Other changes in non-controlling interests				(2,872)						(2,872)	2,872
Ending balance, at Apr. 30, 2012	$ 516,445	$ 2	$ 450		$ (4,171)	$ 3,097	$ 4,994	$ 510,976	$ 1,097	$ 516,445	$ 134,516