Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance, value at Sep. 30, 2009	$ 761,581	$ 1,160	$ 1,822,544	$ (1,028,528)	$ (33,595)
Balance, shares at Sep. 30, 2009		115,950
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued for employee stock-based awards, shares		4,829
Common stock issued for employee stock-based awards, value	15,284	47	15,237
Shares surrendered by employees to pay taxes related to stock-based awards, shares		(1,236)
Shares surrendered by employees to pay taxes related to stock-based awards, value	(20,307)	(12)	(20,295)
Compensation expense from stock-based awards	48,911		48,911
Excess tax benefits (tax shortfalls) from stock-based awards	(1,106)		(1,106)
Net income (loss)	24,368			24,368
Repurchases of common stock, shares	(3,717)	(3,717)
Repurchases of common stock, value	(62,542)	(37)	(62,505)
Foreign currency translation adjustment	(9,035)				(9,035)
Change in pension benefits, net of tax	(9,850)				(9,850)
Balance, value at Sep. 30, 2010	747,304	1,158	1,802,786	(1,004,160)	(52,480)
Balance, shares at Sep. 30, 2010		115,826
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued for employee stock-based awards, shares		4,803
Common stock issued for employee stock-based awards, value	24,756	48	24,708
Shares surrendered by employees to pay taxes related to stock-based awards, shares		(1,043)
Shares surrendered by employees to pay taxes related to stock-based awards, value	(22,520)	(10)	(22,510)
Compensation expense from stock-based awards	45,402		45,402
Excess tax benefits (tax shortfalls) from stock-based awards	9,438		9,438
Net income (loss)	85,424			85,424
Repurchases of common stock, shares	(2,649)	(2,649)
Repurchases of common stock, value	(54,921)	(27)	(54,894)
Foreign currency translation adjustment	(7,174)				(7,174)
Change in pension benefits, net of tax	(5,110)				(5,110)
Other	91		91
Balance, value at Sep. 30, 2011	822,690	1,169	1,805,021	(918,736)	(64,764)
Balance, shares at Sep. 30, 2011	116,937	116,937
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued for employee stock-based awards, shares		5,077
Common stock issued for employee stock-based awards, value	21,210	51	21,159
Shares surrendered by employees to pay taxes related to stock-based awards, shares		(908)
Shares surrendered by employees to pay taxes related to stock-based awards, value	(20,967)	(9)	(20,958)
Compensation expense from stock-based awards	51,305		51,305
Excess tax benefits (tax shortfalls) from stock-based awards	1,109		1,109
Net income (loss)	(35,398)			(35,398)
Repurchases of common stock, shares	(1,553)	(1,553)
Repurchases of common stock, value	(34,953)	(15)	(34,938)
Foreign currency translation adjustment	(2,176)				(2,176)
Change in pension benefits, net of tax	(5,561)				(5,561)
Balance, value at Sep. 30, 2012	$ 797,259	$ 1,196	$ 1,822,698	$ (954,134)	$ (72,501)
Balance, shares at Sep. 30, 2012	119,553	119,553