Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total USD ($)	Voting And Non Voting Common Shares [Member]	Voting Common Stock [Member] USD ($)	Non-Voting Common Stock [Member] USD ($)	Additional Paid-In Capital [Member] USD ($)	Notes Receivable From Stock Option Exercises [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Appropriated Retained Earnings (Deficit) [Member] USD ($)	Retained Earnings [Member] USD ($)	Non Redeemable Non Controlling Interests [Member] USD ($)	Total Permanent Equity [Member] USD ($)	Redeemable Non Controlling Interests [Member] USD ($)
Beginning balance, at Oct. 31, 2009			$ 2	$ 457	$ 44,786	$ (3,078)	$ (1,394)		$ 266,196	$ 91	$ 307,060	$ 43,871
Beginning balance, (shares) at Oct. 31, 2009		117,520
Net income	201,225								174,298	1,259	175,557	25,668
Other comprehensive income	959						959				959
Dividends declared									(78,126)		(78,126)
Issuance of Non-Voting Common Stock:
On exercise of stock options (shares)		3,304
On exercise of stock options				13	51,402	(1,944)					49,471
Under employee stock purchase plan (shares)		158
Under employee stock purchase plan				1	3,887						3,888
Under employee incentive plan (shares)		102
Under employee incentive plan					2,874						2,874
Under restricted stock plan, net of forfeitures (shares)		947
Under restricted stock plan, net of forfeitures				4							4
Stock-based compensation					47,858						47,858
Tax benefit of stock option exercises					10,825						10,825
Repurchase of Voting Common Stock (shares)		(33)
Repurchase of Voting Common Stock					(96)						(96)
Repurchase of Non-Voting Common Stock (shares)		(3,672)
Repurchase of Non-Voting Common Stock	111,173			(14)	(111,159)						(111,173)
Principal repayments on notes receivable from stock option exercises						1,864					1,864
Net subscriptions (redemptions/distributions) of non-controlling interest holders										(775)	(775)	45,761
Deconsolidation												(36,372)
Reclass to temporary equity										(5)	(5)	5
Purchase of non-controlling interests												(11,244)
Other changes in non-controlling interests					(152)				822		670	(670)
Ending balance, at Oct. 31, 2010			2	461	50,225	(3,158)	(435)	0	363,190	570	410,855	67,019
Ending balance, (shares) at Oct. 31, 2010		118,326
Cumulative effect of adoption of new accounting principle								30,666	1,665		32,331
Net income	227,574							(34,533)	214,902	2,524	182,893	44,681
Other comprehensive income	1,775						1,775				1,775
Dividends declared									(85,805)		(85,805)
Issuance of Non-Voting Common Stock:
On exercise of stock options (shares)		3,341
On exercise of stock options				13	55,726	(2,224)					53,515
Under employee stock purchase plan (shares)		144
Under employee stock purchase plan				1	3,766						3,767
Under employee incentive plan (shares)		132
Under employee incentive plan					3,655						3,655
Under restricted stock plan, net of forfeitures (shares)		980
Under restricted stock plan, net of forfeitures				4							4
Stock-based compensation					52,030						52,030
Tax benefit of stock option exercises					7,022						7,022
Repurchase of Non-Voting Common Stock (shares)		(7,300)
Repurchase of Non-Voting Common Stock	198,627			(29)	(171,577)				(27,021)		(198,627)
Principal repayments on notes receivable from stock option exercises						941					941
Net subscriptions (redemptions/distributions) of non-controlling interest holders										(2,139)	(2,139)	120,666
Deconsolidation												(125,844)
Reclass to temporary equity										(66)	(66)	66
Purchase of non-controlling interests												(6,611)
Other changes in non-controlling interests					(847)						(847)	847
Ending balance, at Oct. 31, 2011	461,304		2	450	0	(4,441)	1,340	(3,867)	466,931	889	461,304	100,824
Ending balance, (shares) at Oct. 31, 2011		115,623
Net income	264,768							22,566	203,465	3,994	230,025	34,743
Other comprehensive income	2,583						2,583				2,583
Dividends declared									(88,948)		(88,948)
Issuance of Voting Common Stock (shares)		14
Issuance of Voting Common Stock					56						56
Issuance of Non-Voting Common Stock:
On exercise of stock options (shares)	3,208	3,208
On exercise of stock options				13	50,506	(535)					49,984
Under employee stock purchase plan (shares)		158
Under employee stock purchase plan				1	3,653						3,654
Under employee incentive plan (shares)		95
Under employee incentive plan					2,068						2,068
Under restricted stock plan, net of forfeitures (shares)		1,229
Under restricted stock plan, net of forfeitures				5							5
Stock-based compensation					56,027						56,027
Tax benefit of stock option exercises					8,618						8,618
Repurchase of Non-Voting Common Stock (shares)		(4,035)
Repurchase of Non-Voting Common Stock	106,470			(16)	(91,426)				(15,028)		(106,470)
Principal repayments on notes receivable from stock option exercises						821					821
Net subscriptions (redemptions/distributions) of non-controlling interest holders										(3,238)	(3,238)	45,250
Deconsolidation												(65,092)
Reclass to temporary equity										(132)	(132)	132
Purchase of non-controlling interests												(19,864)
Other changes in non-controlling interests					(2,772)						(2,772)	2,772
Ending balance, at Oct. 31, 2012	$ 613,585		$ 2	$ 453	$ 26,730	$ (4,155)	$ 3,923	$ 18,699	$ 566,420	$ 1,513	$ 613,585	$ 98,765
Ending balance, (shares) at Oct. 31, 2012		116,292