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 [Member]	Retained Earnings [Member]	Non Redeemable Non Controlling Interests [Member]	Total Permanent Equity [Member]	Redeemable Non Controlling Interests [Member]
Beginning balance, at Oct. 31, 2012		$ 2	$ 453	$ 26,730	$ (4,155)	$ 3,923	$ 18,699	$ 566,420	$ 1,513	$ 613,585	$ 98,765
Net income	133,247						(3,233)	113,486	2,536	112,789	20,458
Other comprehensive loss	(2,672)					(2,672)				(2,672)
Dividends declared								(167,868)		(167,868)
Issuance of Non-Voting Common Stock:
On exercise of stock options			16	88,190	(4,734)					83,472
Under employee stock purchase plan			1	1,761						1,762
Under employee incentive plan				1,296						1,296
Under restricted stock plan, net of forfeitures			6							6
Stock-based compensation				26,884						26,884
Tax benefit of stock option exercises				13,118						13,118
Repurchase of Voting Common Stock				(73)						(73)
Repurchase of Non-Voting Common Stock	22,723		(3)	(22,720)						(22,723)
Principal repayments on notes receivable from stock option exercises					1,611					1,611
Net subscriptions (redemptions/distributions) of non-controlling interest holders									(2,261)	(2,261)	39,450
Deconsolidation											(13,969)
Reclass to temporary equity									(224)	(224)	224
Purchase of non-controlling interests											(43,507)
Issuance of subsidiary equity											13,927
Other changes in non-controlling interests				(5,904)						(5,904)	5,904
Ending balance, at Apr. 30, 2013		2	473	129,282	(7,278)	1,251	15,466	512,038	1,564	652,798	121,252
Beginning balance, at Oct. 31, 2013	671,539	2	474	124,837	(7,122)	(177)	10,249	541,521	1,755	671,539	74,856
Net income	154,777						(1,095)	146,259	2,733	147,897	6,880
Other comprehensive loss	(5,468)					(5,468)				(5,468)
Dividends declared								(53,497)		(53,497)
Issuance of Voting Common Stock				59						59
Issuance of Non-Voting Common Stock:
On exercise of stock options			5	29,964	(1,922)					28,047
Under employee stock purchase plan				1,909						1,909
Under employee incentive plan				2,493						2,493
Under restricted stock plan, net of forfeitures			5							5
Stock-based compensation				29,489						29,489
Tax benefit of stock option exercises				11,206						11,206
Repurchase of Voting Common Stock				(77)						(77)
Repurchase of Non-Voting Common Stock	135,333		(14)	(135,319)						(135,333)
Principal repayments on notes receivable from stock option exercises					1,570					1,570
Net subscriptions (redemptions/distributions) of non-controlling interest holders									(2,576)	(2,576)	(2,734)
Deconsolidation											(745)
Reclass to temporary equity									(352)	(352)	352
Purchase of non-controlling interests											(6,839)
Issuance of subsidiary equity											9,935
Other changes in non-controlling interests				(12,557)						(12,557)	12,557
Ending balance, at Apr. 30, 2014	$ 684,354	$ 2	$ 470	$ 52,004	$ (7,474)	$ (5,645)	$ 9,154	$ 634,283	$ 1,560	$ 684,354	$ 94,262