CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY AND COMPREHENSIVE INCOME (USD $)	Class A Common Stock [Member]	Redeemable Noncontrolling Interests [Member]	Common Stock [Member]	Capital In Excess Of Par Value [Member]	Deferred Compensation Obligation [Member]	Common Stock Issued To Trust [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interests [Member]	Total
Balances at Oct. 31, 2008	$ 158,000	$ 48,736,000	$ 106,000	$ 229,443,000	$ 0	$ 0	$ (4,819,000)	$ 156,976,000	$ 71,138,000	$ 453,002,000
Comprehensive income:
Net income	0	8,228,000	0	0	0	0	0	44,626,000	6,991,000	51,617,000
Foreign currency translation	0	0	0	0	0	0	3,276,000	0	0	3,276,000
Total comprehensive income	0	8,228,000	0	0	0	0	3,276,000	44,626,000	6,991,000	54,893,000
Repurchases of common stock (Note 8)	(2,000)	0	(2,000)	(8,094,000)	0	0	0	0	0	(8,098,000)
Cash dividends	0	0	0	0	0	0	0	(3,150,000)	0	(3,150,000)
Tax benefit from stock option exercises	0	0	0	1,890,000	0	0	0	0	0	1,890,000
Proceeds from stock option exercises	1,000	0	0	1,206,000	0	0	0	0	0	1,207,000
Stock option compensation expense	0	0	0	181,000	0	0	0	0	0	181,000
Distributions to noncontrolling interests	0	(9,130,000)	0	0	0	0	0	0	(461,000)	(461,000)
Acquisitions of noncontrolling interests	0	(10,015,000)	0	0	0	0	0	6,845,000	0	6,845,000
Noncontrolling interests assumed related to acquisition	0	7,505,000	0	0	0	0	0	(4,200,000)	0	(4,200,000)
Adjustments to redemption amount of redeemable noncontrolling interests	0	11,613,000	0	0	0	0	0	(11,613,000)	0	(11,613,000)
Other	0	0	0	(1,000)	0	0	162,000	1,000	0	162,000
Balances at Oct. 31, 2009	157,000	56,937,000	104,000	224,625,000	0	0	(1,381,000)	189,485,000	77,668,000	490,658,000
Comprehensive income:
Net income	0	9,370,000	0	0	0	0	0	54,938,000	8,047,000	62,985,000
Foreign currency translation	0	0	0	0	0	0	1,271,000	0	0	1,271,000
Total comprehensive income	0	9,370,000	0	0	0	0	1,271,000	54,938,000	8,047,000	64,256,000
Repurchases of common stock (Note 8)	(100,000)									(600,000)
Cash dividends	0	0	0	0	0	0	0	(3,546,000)	0	(3,546,000)
Five-for-four common stock split	40,000	0	26,000	(66,000)	0	0	0	(68,000)	0	(68,000)
Tax benefit from stock option exercises	0	0	0	951,000	0	0	0	0	0	951,000
Proceeds from stock option exercises	2,000	0	1,000	1,812,000	0	0	0	0	0	1,815,000
Stock option compensation expense	0	0	0	1,353,000	0	0	0	0	0	1,353,000
Redemptions of common stock related to stock option exercises	0	0	0	(681,000)	0	0	0	0	0	(681,000)
Distributions to noncontrolling interests	0	(10,360,000)	0	0	0	0	0	0	0	0
Acquisitions of noncontrolling interests	0	(795,000)	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests	0	(104,000)	0	0	0	0	0	104,000	0	104,000
Other	0	0	0	(1,000)	0	0	(14,000)	0	(1,000)	(16,000)
Balances at Oct. 31, 2010	199,000	55,048,000	131,000	227,993,000	0	0	(124,000)	240,913,000	85,714,000	554,826,000
Comprehensive income:
Net income	0	11,264,000	0	0	0	0	0	72,820,000	11,369,000	84,189,000
Foreign currency translation	0	0	0	0	0	0	3,012,000	0	0	3,012,000
Total comprehensive income	0	11,264,000	0	0	0	0	3,012,000	72,820,000	11,369,000	87,201,000
Repurchases of common stock (Note 8)	(700,000)									(13,600,000)
Cash dividends	0	0	0	0	0	0	0	(4,494,000)	0	(4,494,000)
Five-for-four common stock split	50,000	0	33,000	(83,000)	0	0	0	(102,000)	0	(102,000)
Tax benefit from stock option exercises	0	0	0	7,703,000	0	0	0	0	0	7,703,000
Proceeds from stock option exercises	2,000	0	9,000	2,156,000	0	0	0	0	0	2,167,000
Stock option compensation expense	0	0	0	2,647,000	0	0	0	0	0	2,647,000
Redemptions of common stock related to stock option exercises	0	0	(3,000)	(14,295,000)	0	0	0	0	0	(14,298,000)
Deferred Compensation Obligation	0	0	0	0	522,000	(522,000)	0	0	0	0
Distributions to noncontrolling interests	0	(8,893,000)	0	0	0	0	0	0	(6,000,000)	(6,000,000)
Acquisitions of noncontrolling interests	0	(7,241,000)	0	0	0	0	0	0	0	0
Noncontrolling interests assumed related to acquisition	0	5,612,000	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests	0	9,640,000	0	0	0	0	0	(9,640,000)	0	(9,640,000)
Other	(1,000)	0	1,000	(1,000)	0	0	145,000	0	0	144,000
Balances at Oct. 31, 2011	$ 250,000	$ 65,430,000	$ 171,000	$ 226,120,000	$ 522,000	$ (522,000)	$ 3,033,000	$ 299,497,000	$ 91,083,000	$ 620,154,000