CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance at Oct. 31, 2007	$ 471,154	$ 743	$ 513,297	$ (77,747)	$ 34,861
Balance (in shares) at Oct. 31, 2007		74,273
Increase (Decrease) in Stockholders' Equity
Net income (loss)	97,097			97,097
Change in cumulative foreign currency translation adjustment	(42,374)				(42,374)
Cumulative effect of adopting uncertain tax position guidance	(1,075)			(1,075)
Proceeds from exercise of stock options	25,962	12	25,950
Proceeds from exercise of stock options (in shares)		1,236
Stock-based compensation	35,341		35,341
Issuance of restricted stock, net of forfeitures and cancellations	(215)	6	(221)
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		635
Issuance of common stock in connection with acquisition	29,228	16	29,212
Issuance of common stock in connection with acquisition (in shares)		1,550
Balance at Oct. 31, 2008	615,118	777	603,579	18,275	(7,513)
Balance (in shares) at Oct. 31, 2008		77,694
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(140,454)			(140,454)
Change in cumulative foreign currency translation adjustment	15,705				15,705
Proceeds from exercise of stock options	22		22
Proceeds from exercise of stock options (in shares)		2
Purchase of call options	(43,592)		(43,592)
Sale of warrants	26,342		26,342
Stock-based compensation	31,193		31,193
Adoption of new accounting guidance related to convertible debt	42,018		42,018
Issuance of restricted stock, net of forfeitures and cancellations		42	(42)
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		4,229
Income tax effect of stock award cancellations and forfeitures	(726)		(726)
Balance at Oct. 31, 2009	545,626	819	658,794	(122,179)	8,192
Balance (in shares) at Oct. 31, 2009		81,925
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(28,802)			(28,802)
Change in cumulative foreign currency translation adjustment	(11,905)				(11,905)
Stock-based compensation	12,930		12,930
Issuance of restricted stock, net of forfeitures and cancellations		21	(21)
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		2,052
Income tax effect of stock award cancellations and forfeitures	2,774		2,774
Balance at Mar. 31, 2010	520,623	840	674,477	(150,981)	(3,713)
Balance (in shares) at Mar. 31, 2010		83,977
Increase (Decrease) in Stockholders' Equity
Net income (loss)	48,458			48,458
Change in cumulative foreign currency translation adjustment	14,172				14,172
Proceeds from exercise of stock options	733	1	732
Proceeds from exercise of stock options (in shares)		65
Stock-based compensation	29,293		29,293
Issuance of restricted stock, net of forfeitures and cancellations		18	(18)
Issuance of restricted stock, net of forfeitures and cancellations (in shares)		1,884
Issuance of common stock in connection with acquisition	2,000	2	1,998
Issuance of common stock in connection with acquisition (in shares)		193
Balance at Mar. 31, 2011	$ 615,279	$ 861	$ 706,482	$ (102,523)	$ 10,459
Balance (in shares) at Mar. 31, 2011		86,119