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 [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   $ (4,441) $ 1,340 $ (3,867) $ 466,931 $ 889 $ 461,304 $ 100,824
Net income 127,640           8,861 100,141 1,776 110,778 16,862
Other comprehensive income (loss) 1,757         1,757       1,757  
Dividends declared               (43,991)   (43,991)  
Issuance of Voting Common Stock       56           56  
Issuance of Non-Voting Common Stock:                      
On exercise of stock options     2 8,458 (211)         8,249  
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       29,320           29,320  
Tax benefit of stock option exercises       1,162           1,162  
Repurchase of Non-Voting Common Stock 51,669   (8) (39,556)       (12,105)   (51,669)  
Principal repayments on notes receivable from stock option exercises         481         481  
Net subscriptions (redemptions/distributions) of non-controlling interest holders                 (1,436) (1,436) 20,102
Deconsolidation                     (6,276)
Reclass to temporary equity                 (132) (132) 132
Other changes in non-controlling interests       (2,872)           (2,872) 2,872
Ending balance, at Apr. 30, 2012   2 450   (4,171) 3,097 4,994 510,976 1,097 516,445 134,516
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 133,247           (3,233) 113,486 2,536 112,789 20,458
Other comprehensive income (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 $ 652,798 $ 2 $ 473 $ 129,282 $ (7,278) $ 1,251 $ 15,466 $ 512,038 $ 1,564 $ 652,798 $ 121,252