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Stockholders' Equity (Equity Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Jun. 30, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2010
Payments for Repurchase of Common Stock |  |  | $ 157,160 | $ 141,488 | $ 45,754 |
Purchases of treasury stock, number of shares | 458 | 2,048 |  |  |  |
Total unrecognized compensation cost related to non-vested stock-based compensation arrangements | $ 9,412 |  | $ 9,412 |  |  |
Unrecognized compensation cost is expected to be recognized over a weighted-average period |  |  | 1 year 4 months 24 days |  |  |
Forfeiture rate, Board of Directors | 0.00% |  | 0.00% |  |  |
Forfeiture rate, non-Board of Directors | 9.00% |  | 9.00% |  |  |
2010 Authorization [Member] |  |  |  |  |  |
Authorized repurchase amount |  |  |  |  |  | $ 200,000
Repurchase period in years |  |  |  |  | 3 years |
Purchases of treasury stock |  |  |  |  | $ 45,754 |
Purchases of treasury stock, number of shares |  |  |  |  | 1,233 |
2013 Authorization [Member] |  |  |  |  |  |
Authorized repurchase amount | $ 200,000 |  | $ 200,000 |  |  |
Repurchase period in years |  |  | 3 years |  |  |
Purchases of treasury stock |  |  | $ 32,118 | $ 141,488 |  |
Purchases of treasury stock, number of shares |  |  | 622 | 3,272 |  |
2015 Authorization [Member] |  |  |  |  |  |
Authorized repurchase amount | $ 300,000 |  | $ 300,000 |  |  |
Repurchase period in years |  |  | 3 years |  |  |
Purchases of treasury stock, number of shares |  |  | 2,506 |  |  |
Goldman Sachs Accelerated Share Repurchase Program [Member] |  |  |  |  |  |
Payments for Repurchase of Common Stock |  | $ 125,000 |  |  |  |
Purchases of treasury stock, number of shares | 458 | 2,048 |  |  |  |
Restricted Stock Award [Member] |  |  |  |  |  |
Terms of restricted stock award |  |  | The shares of restricted stock were awarded to Mr. Gendron pursuant to a form restricted stock agreement approved by Woodward's Compensation Committee (the "Committee"), which generally provides that: if the recipient of a restricted stock award is terminated from the Company for any reason other than death or disability during the restricted period, all shares of restricted stock will be immediately forfeited; if the recipient dies or becomes permanently disabled prior to the recipient's termination and during the restricted period, all restrictions will lapse and the shares of restricted stock will fully vest immediately; similarly, in the event of a Change in Control (as defined in the form of restricted stock agreement) of the Company during the restricted period and prior to the recipient's termination for any reason, all restrictions will lapse and the shares of restricted stock will fully vest immediately; during the restricted period, a recipient may exercise full voting rights with respect to the shares of restricted stock; dividends on the shares of restricted stock will accrue, but will not be paid, during the restricted period; and all dividends accrued during the restricted period will be paid upon any vesting of the shares of restricted stock, without payment of interest, provided that if the shares of restricted stock are forfeited for any reason, all accrued dividends will likewise be forfeited. The form of restricted stock agreement also includes adjustment provisions in the event the Company engages in certain recapitalization or similar transactions or in the event of a change of law or regulation. Upon vesting, shares become freely transferrable. |  |  |

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