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Retirement Benefits (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Value of Company Stock Contributed to Defined Contribution Benefit Plans | $ 11,193 | $ 9,780 | $ 9,335
Shares of Woodward stock held in Woodward Retirement Savings Plan | 5,176 | 5,681 |
Pension Plans, Defined Benefit [Member] |  |  |
Net periodic retirement pension (beneift) cost | (6,048) | 4,492 | 4,481
Projected benefit obligation | 201,275 | 190,423 | 198,476
Fair value of plan assets | 205,161 | 190,175 | 161,503
Benefits paid | 6,050 | 5,736 |
United States Pension Plans of US Entity, Defined Benefit [Member] |  |  |
Net periodic retirement pension (beneift) cost | (6,112) | 3,443 | 2,937
Discount rate support/source data | In the United States, Woodward used a bond portfolio matching analysis based on recently traded, non-callable bonds rated AA or better that have at least $50 million outstanding. |  |
Projected benefit obligation | 137,740 | 126,532 | 137,639
Fair value of plan assets | 142,090 | 129,518 | 105,966
Benefits paid | 3,732 | 3,131 |
Estimated future employer contributions in the next fiscal year | 21 |  |
Accumulated benefit obligation | 137,423 | 116,061 |
United Kingdom Plan, Defined Benefit [Member] |  |  |
Projected benefit obligation | 52,710 |  |
Fair value of plan assets | 52,260 |  |
Estimated future employer contributions in the next fiscal year | 1,507 |  |
Japan Plan, Defined Benefit [Member] |  |  |
Projected benefit obligation | 10,825 |  |
Fair value of plan assets | 10,811 |  |
Estimated future employer contributions in the next fiscal year | 1,045 |  |
Switzerland Plan, Defined Benefit [Member] |  |  |
Discount rate support/source data | In Switzerland, Woodward used high quality swap rates plus a credit spread of 0.20% in fiscal year 2013 and 0.46% in fiscal year 2012, as high quality swaps are available in Switzerland at various durations and trade at higher volumes than bonds. |  |
Foreign Pension Plans, Defined Benefit [Member] |  |  |
Net periodic retirement pension (beneift) cost | 64 | 1,049 | 1,544
Discount rate support/source data | In the United Kingdom and Japan, Woodward used cash flow matching to develop a single rate equivalent for a theoretical portfolio of non-callable, AA-rated bonds for each jurisdiction. |  |
Projected benefit obligation | 63,535 | 63,891 | 60,837
Fair value of plan assets | 63,071 | 60,657 | 55,537
Benefits paid | 2,318 | 2,605 |
Accumulated benefit obligation | 61,041 | 60,701 |
Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |
Net periodic retirement pension (beneift) cost | 1,121 | 1,089 | 1,409
Projected benefit obligation | 29,225 | 28,996 | 37,550
Fair value of plan assets | 0 | 0 | 0
Benefits paid | 4,243 | 4,206 |
Estimated future employer contributions in the next fiscal year | 3,778 |  |
Option to elect company provided medical insurance coverage up to this age and a Medicare supplemental plan after this age | 65 |  |
Approximate number of retired employees and their covered dependents and beneficiaries currently providing postretirement benefits | 900 |  |
Approximate number of active employees and their covered dependants and beneficiaries who may receive postretirement benefits in the future | 45 |  |
As a result of a plan amendment, all postretirement medical benefits are fully insured for retirees who have attained this age | 65 |  |
Accumulated benefit obligation | 29,225 | 28,996 |
United Kingdom, Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |
Discount rate support/source data | In the United Kingdom Woodward used cash flow matching to develop a single rate equivalent for a theoretical portfolio of non-callable, AA-rated bonds. |  |
Projected benefit obligation | 438 |  |
Benefits paid | 10 |  |
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] |  |  |
Discount rate support/source data | In the United States, Woodward used a bond portfolio matching analysis based on recently traded, non-callable bonds rated AA or better that have at least $50 million outstanding. |  |
Cash and Cash Equivalents [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 484 | 422 |
Pooled funds: Index linked U.K. government securities fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 4,566 | 4,176 |
Pooled funds: Index linked U.K. long-term government securities fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 5,569 | 4,908 |
Mutual funds: U.S. corporate bond fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 56,559 | 49,328 |
Pooled funds: Index linked U.K. corporate bonds fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 16,897 | 15,810 |
Equity Funds [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 12,327 | 11,324 |
Pooled funds: Japanese fixed income securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 4,676 | 4,414 |
Pooled funds: International fixed income securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 1,638 | 1,535 |
Mutual funds: U.S. equity large cap fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 49,220 | 44,140 |
Mutual funds: International equity large cap growth fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 35,995 | 35,777 |
Pooled funds: Japanese equity securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 2,330 | 2,269 |
Pooled funds: International equity securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 2,067 | 1,989 |
Pooled funds: Index linked U.K. equity fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 6,240 | 6,060 |
Pooled funds: Index linked international equity fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets | 6,593 | 6,047 |
Insurance Backed Assets [Member] | Pension Plans, Defined Benefit [Member] |  |  |
Fair value of plan assets |  | 1,976 |
Multiemployer Plan, Japan [Member] | Minimum [Member] |  |  |
One-time contribution that would be incurred if the Company elects to withdraw | 500 |  |
Multiemployer Plan, Japan [Member] | Maximum [Member] |  |  |
One-time contribution that would be incurred if the Company elects to withdraw | 1,500 |  |
Treasury Stock at Cost [Member] |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans | $ 8,356 | $ 7,857 | $ 4,097
Treasury Stock Issued During Period, Shares, Employee Benefit Plans | 260 | 250 | 209

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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503844 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Disclosure of how the assumed discount rate was determined and the specific source data used to support the discount rate. + References No definition available. + Details
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- Definition 1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Projected Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6522206 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Postretirement Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503904 + Details
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- Definition The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Postretirement Benefits -URI http://asc.fasb.org/extlink&oid=6521376 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Benefits -URI http://asc.fasb.org/extlink&oid=6506267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Glossary Benefits -URI http://asc.fasb.org/extlink&oid=6506309 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 + Details
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- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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- Definition As the result of a plan amendment in fiscal year 2009, all the postretirement medical plans are fully insured for retirees who have attained this age. + References No definition available. + Details
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