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, 2011		$ 2	$ 450	$ 0	$ (4,441)	$ 1,340	$ (3,867)	$ 466,931	$ 889	$ 461,304	$ 100,824
Net income	64,870						4,991	47,271	808	53,070	11,800
Other comprehensive income	663					663				663
Dividends declared								(22,022)		(22,022)
Issuance of Non-Voting Common Stock:
On exercise of stock options			1	2,735	(137)					2,599
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				16,342						16,342
Tax benefit of stock option exercises				225						225
Repurchase of Non-Voting Common Stock	34,800		(6)	(19,766)				(15,028)		(34,800)
Principal repayments on notes receivable from stock option exercises					460					460
Net subscriptions (redemptions/distributions) of non-controlling interest holders									(800)	(800)	19,334
Deconsolidation											(16,564)
Reclass to temporary equity									(132)	(132)	132
Other changes in non-controlling interests				(2,968)						(2,968)	2,968
Ending balance, at Jan. 31, 2012		2	451	0	(4,118)	2,003	1,124	477,152	765	477,379	118,494
Beginning 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
Net income	62,127						(3,330)	49,805	1,196	47,671	14,456
Other comprehensive income	(2,327)					(2,327)				(2,327)
Dividends declared								(143,638)		(143,638)
Issuance of Non-Voting Common Stock:
On exercise of stock options			12	61,079	(4,464)					56,627
Under employee stock purchase plan			0	1,761						1,761
Under employee incentive plan				1,279						1,279
Under restricted stock plan, net of forfeitures			6							6
Stock-based compensation				14,023						14,023
Tax benefit of stock option exercises				8,253						8,253
Repurchase of Voting Common Stock				(73)						(73)
Repurchase of Non-Voting Common Stock	13,282		(2)	(13,280)				0		(13,282)
Principal repayments on notes receivable from stock option exercises					931					931
Net subscriptions (redemptions/distributions) of non-controlling interest holders									(1,046)	(1,046)	9,970
Deconsolidation											(10,155)
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				(6,238)						(6,238)	6,238
Ending balance, at Jan. 31, 2013	$ 577,308	$ 2	$ 469	$ 93,534	$ (7,688)	$ 1,596	$ 15,369	$ 472,587	$ 1,439	$ 577,308	$ 89,918