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Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Loss [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance, shares at Sep. 30, 2013 |  | 118,446 |  |  |
Beginning Balance, value at Sep. 30, 2013 | $ 926,480 | $ 1,185 | $ 1,786,820 | $ (810,365) | $ (51,160)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Common stock issued for employee stock-based awards, shares |  | 2,455 |  |  |
Common stock issued for employee stock-based awards, value | 877 | $ 24 | 853 |  |
Shares surrendered by employees to pay taxes related to stock-based awards, shares |  | (808) |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards, value | (26,857) | $ (8) | (26,849) |  |
Compensation expense from stock-based awards | 50,889 |  | 50,889 |  |
Excess tax benefits (tax shortfalls) from stock-based awards | 10,428 |  | 10,428 |  |
Net income | $ 160,194 |  |  | 160,194 |
Repurchases of common stock, shares | (5,100) | (5,068) |  |  |
Repurchases of common stock, value | $ (187,415) | $ (51) | (187,364) |  |
Common stock repurchase holdback | (37,500) |  | (37,500) |  |
Unrealized loss on hedging instruments, net of tax | 0 |  |  |  |
Foreign currency translation adjustment | (24,069) |  |  |  | (24,069)
Unrealized loss on available-for-sale securities, net of tax | 0 |  |  |  |
Change in pension benefits, net of tax | (19,138) |  |  |  | (19,138)
Ending Balance, shares at Sep. 30, 2014 |  | 115,025 |  |  |
Ending Balance, value at Sep. 30, 2014 | 853,889 | $ 1,150 | 1,597,277 | (650,171) | (94,367)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Common stock issued for employee stock-based awards, shares |  | 2,212 |  |  |
Common stock issued for employee stock-based awards, value | 41 | $ 22 | 19 |  |
Shares surrendered by employees to pay taxes related to stock-based awards, shares |  | (764) |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards, value | (29,207) | $ (8) | (29,199) |  |
Compensation expense from stock-based awards | 50,182 |  | 50,182 |  |
Excess tax benefits (tax shortfalls) from stock-based awards | 24 |  | 24 |  |
Net income | $ 47,557 |  |  | 47,557 |
Repurchases of common stock, shares | (2,700) | (2,728) |  |  |
Repurchases of common stock, value | $ (64,940) | $ (27) | (64,913) |  |
Unrealized loss on hedging instruments, net of tax | 0 |  |  |  |
Foreign currency translation adjustment | (47,177) |  |  |  | (47,177)
Unrealized loss on available-for-sale securities, net of tax | 0 |  |  |  |
Change in pension benefits, net of tax | $ 49,802 |  |  |  | 49,802
Ending Balance, shares at Sep. 30, 2015 | 113,745 | 113,745 |  |  |
Ending Balance, value at Sep. 30, 2015 | $ 860,171 | $ 1,137 | 1,553,390 | (602,614) | (91,742)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Common stock issued for employee stock-based awards, shares |  | 1,820 |  |  |
Common stock issued for employee stock-based awards, value | 21 | $ 18 | 3 |  |
Shares surrendered by employees to pay taxes related to stock-based awards, shares |  | (597) |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards, value | (20,939) | $ (5) | (20,934) |  |
Compensation expense from stock-based awards | 65,996 |  | 65,996 |  |
Excess tax benefits (tax shortfalls) from stock-based awards | 93 |  | 93 |  |
Net income | (54,465) |  |  | (54,465) |
Unrealized loss on hedging instruments, net of tax | (1,244) |  |  |  | (1,244)
Foreign currency translation adjustment | 408 |  |  |  | 408
Unrealized loss on available-for-sale securities, net of tax | (122) |  |  |  | (122)
Change in pension benefits, net of tax | $ (7,253) |  |  |  | (7,253)
Ending Balance, shares at Sep. 30, 2016 | 114,968 | 114,968 |  |  |
Ending Balance, value at Sep. 30, 2016 | $ 842,666 | $ 1,150 | $ 1,598,548 | $ (657,079) | $ (99,953)

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