CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	Total	Redeemable Noncontrolling Interests [Member]	Common Stock [Member]	Common Class A [Member]	Additional Paid-in Capital [Member]	Deferred Compensation Obligation [Member]	Common Stock Issued To Trust [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Balances at Oct. 31, 2009	$ 490,658	$ 56,937	$ 104	$ 157	$ 224,625	$ 0	$ 0	$ (1,381)	$ 189,485	$ 77,668
Comprehensive income:
Net income	62,985	9,370	0	0	0	0	0	0	54,938	8,047
Foreign currency translation	1,271	0	0	0	0	0	0	1,271	0	0
Total comprehensive income	64,256	9,370	0	0	0	0	0	1,271	54,938	8,047
Cash dividends	(3,546)	0	0	0	0	0	0	0	(3,546)	0
Five-for-four common stock split	(68)	0	26	40	(66)	0	0	0	(68)	0
Tax benefit from stock option exercises	951	0	0	0	951	0	0	0	0	0
Stock option compensation expense	1,353	0	0	0	1,353	0	0	0	0	0
Proceeds from stock option exercises	1,815	0	1	2	1,812	0	0	0	0	0
Redemptions of common stock related to stock option exercises	(681)	0	0	0	(681)	0	0	0	0	0
Distributions to noncontrolling interests	0	(10,360)	0	0	0	0	0	0	0	0
Acquisitions of noncontrolling interests	0	(795)	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests	104	(104)	0	0	0	0	0	0	104	0
Other	(16)	0	0	0	(1)	0	0	(14)	0	(1)
Balances at Oct. 31, 2010	554,826	55,048	131	199	227,993	0	0	(124)	240,913	85,714
Comprehensive income:
Net income	84,189	11,264	0	0	0	0	0	0	72,820	11,369
Foreign currency translation	3,012	0	0	0	0	0	0	3,012	0	0
Total comprehensive income	87,201	11,264	0	0	0	0	0	3,012	72,820	11,369
Cash dividends	(4,494)	0	0	0	0	0	0	0	(4,494)	0
Five-for-four common stock split	(102)	0	33	50	(83)	0	0	0	(102)	0
Tax benefit from stock option exercises	7,703	0	0	0	7,703	0	0	0	0	0
Stock option compensation expense	2,647	0	0	0	2,647	0	0	0	0	0
Proceeds from stock option exercises	2,167	0	9	2	2,156	0	0	0	0	0
Redemptions of common stock related to stock option exercises	(14,298)	0	(3)	0	(14,295)	0	0	0	0	0
Distributions to noncontrolling interests	(6,000)	(8,893)	0	0	0	0	0	0	0	(6,000)
Acquisitions of noncontrolling interests	0	(7,241)	0	0	0	0	0	0	0	0
Noncontrolling interests assumed related to acquisition	0	5,612	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests	(9,640)	9,640	0	0	0	0	0	0	(9,640)	0
Deferred Compensation Obligation	0	0	0	0	0	522	(522)	0	0	0
Other	144	0	1	(1)	(1)	0	0	145	0	0
Balances at Oct. 31, 2011	620,154	65,430	171	250	226,120	522	(522)	3,033	299,497	91,083
Comprehensive income:
Net income	97,149	9,526	0	0	0	0	0	0	85,147	12,002
Foreign currency translation	(6,457)	0	0	0	0	0	0	(6,457)	0	0
Total comprehensive income	90,692	9,526	0	0	0	0	0	(6,457)	85,147	12,002
Cash dividends	(5,689)	0	0	0	0	0	0	0	(5,689)	0
Five-for-four common stock split	(16)	0	42	63	(105)	0	0	0	(16)	0
Stock Issued During Period, Value, Employee Benefit Plan	982	0	0	0	982	0	0	0	0	0
Tax benefit from stock option exercises	13,164	0	0	0	13,164	0	0	0	0	0
Stock option compensation expense	3,948	0	0	0	3,948	0	0	0	0	0
Proceeds from stock option exercises	833	0		2	831	0	0	0	0	0
Redemptions of common stock related to stock option exercises	(307)	0		0	(307)	0	0	0	0	0
Distributions to noncontrolling interests	0	(9,090)	0	0	0	0	0	0	0
Acquisitions of noncontrolling interests	0	(7,616)	0	0	0	0	0	0	0	0
Noncontrolling interests assumed related to acquisition	0	3,918	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests	(3,775)	3,775	0	0	0	0	0	0	(3,775)	0
Deferred Compensation Obligation	0	0	0	0	0	301	(301)	0	0	0
Other	(227)	1,223	0	0	(1)	0	0	(148)	(79)	1
Balances at Oct. 31, 2012	$ 719,759	$ 67,166	$ 213	$ 315	$ 244,632	$ 823	$ (823)	$ (3,572)	$ 375,085	$ 103,086