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Retirement Benefits (Narrative) (Details) shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 USD ($) shares | Mar. 31, 2014 USD ($) shares | Mar. 31, 2013 USD ($) shares | Sep. 30, 2015 USD ($) shares | Sep. 30, 2014 USD ($) shares | Sep. 30, 2013 USD ($) shares
Value of Company Stock Contributed to Defined Contribution Benefit Plans | $ 12,574 | $ 11,193 | $ 9,780 |  |  |
Treasury Stock Issued During Period, Shares, Employee Benefit Plans | shares | 259 | 260 | 250 |  |  |
Shares of Woodward stock held in Woodward Retirement Savings Plan | shares |  |  |  | 4,887 | 5,176 |
Years of service required to be eligible to participate in plan |  |  |  | 10 years |  |
Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | $ 208,101 | $ 201,275 | $ 190,423
Fair value of plan assets |  |  |  | 196,253 | 205,161 | 190,175
Benefits paid |  |  |  | 6,502 | 6,050 |
United States Pension Plans of US Entity, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | 145,870 | 137,740 | 126,532
Fair value of plan assets |  |  |  | 135,590 | 142,090 | $ 129,518
Benefits paid |  |  |  | 4,078 | $ 3,732 |
Estimated future employer contributions in the next fiscal year |  |  |  | $ 24 |  |
Discount rate support/source data |  |  |  | high-quality corporate bond yield curve matched with projected separate cash flows to settle the entire benefit obligations | bond portfolio matching analysis based on recently traded, non-callable bonds rated AA or better that have at least $50 million outstanding |
Accumulated benefit obligation |  |  |  | $ 145,870 | $ 137,423 |
United Kingdom Plan, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | 52,295 |  |
Fair value of plan assets |  |  |  | 50,033 |  |
Estimated future employer contributions in the next fiscal year |  |  |  | 544 |  |
Japan Plan, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | 9,936 |  |
Fair value of plan assets |  |  |  | 10,630 |  |
Estimated future employer contributions in the next fiscal year |  |  |  | 251 |  |
Switzerland Plan, Defined Benefit [Member] |  |  |  |  |  |
Discount rate support/source data |  |  |  |  |  | high quality swap rates plus a credit spread of 0.20% in fiscal year 2013
Foreign Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | 62,231 | 63,535 | $ 63,891
Fair value of plan assets |  |  |  | 60,663 | 63,071 | 60,657
Benefits paid |  |  |  | $ 2,424 | 2,318 |
Discount rate support/source data |  |  |  | In the United Kingdom and Japan, Woodward continues to use a high-quality corporate bond yield curve matched with separate cash flows to develop a single rate to determine the single rate equivalent to settle the entire benefit obligations in each jurisdiction |  |
Accumulated benefit obligation |  |  |  | $ 59,742 | 61,041 |
Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | 34,927 | 29,225 | 28,996
Fair value of plan assets |  |  |  | 0 | 0 | 0
Benefits paid |  |  |  | 3,848 | 4,243 |
Estimated future employer contributions in the next fiscal year |  |  |  | 4,103 |  |
Accumulated benefit obligation |  |  |  | $ 34,927 | $ 29,225 |
Option to elect company provided medical insurance coverage up to this age and a Medicare supplemental plan after this age |  |  |  | 65 |  |
Age employees were eligible to participate in plan |  |  |  | 55 |  |
Approximate number of retired employees and their covered dependents and beneficiaries currently providing postretirement benefits |  |  |  | 850 |  |
Approximate number of active employees and their covered dependants and beneficiaries who may receive postretirement benefits in the future |  |  |  | 35 |  |
United Kingdom, Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |  |  |  |
Projected benefit obligation |  |  |  | $ 486 |  |
Benefits paid |  |  |  | $ 15 |  |
Discount rate support/source data |  |  |  | high-quality corporate bond yield curve matched with separate cash flows to develop a single rate to determine the single rate equivalent to settle the entire benefit obligations |  |
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] |  |  |  |  |  |
Discount rate support/source data |  |  |  | high-quality corporate bond yield curve matched with projected separate cash flows to settle the entire benefit obligations | 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 |  |  |  | $ 668 | $ 484 |
Pooled funds: Index linked U.K. government securities fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 4,716 | 4,566 |
Pooled funds: Index linked U.K. long-term government securities fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 10,583 | 5,569 |
Mutual funds: U.S. corporate bond fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 56,210 | 56,559 |
Pooled funds: Index linked U.K. corporate bonds fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 16,613 | 16,897 |
Equity Funds [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  |  | 12,327 |
Pooled funds: Japanese fixed income securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 4,805 | 4,676 |
Pooled funds: International fixed income securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 1,624 | 1,638 |
Mutual funds: U.S. equity large cap fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 47,517 | 49,220 |
Mutual funds: International equity large cap growth fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 31,396 | 35,995 |
Pooled funds: Japanese equity securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 2,116 | 2,330 |
Pooled funds: International equity securities [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 1,982 | 2,067 |
Pooled funds: Index linked U.K. equity fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 8,687 | 6,240 |
Pooled funds: Index linked international equity fund [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |  |
Fair value of plan assets |  |  |  | 9,336 | 6,593 |
Business Acquisition, Acquiree - Duarte Business [Member] |  |  |  |  |  |
Pension and Other Postretirement Defined Benefit Plans Liabilities |  |  |  | 95 |  |
Total stockholders equity |  |  |  |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  |  |  | 12,574 | 11,193 | 9,780
Treasury Stock at Cost [Member] |  |  |  |  |  |
Value of Company Stock Contributed to Defined Contribution Benefit Plans |  |  |  | $ 8,084 | $ 8,356 | $ 7,857
Treasury Stock Issued During Period, Shares, Employee Benefit Plans | shares |  |  |  | 259 | 260 | 250

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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=58740216&loc=d3e1928-114920 + 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=58740216&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 -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Benefits -URI http://asc.fasb.org/extlink&oid=49170737 Reference 3: 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=58740216&loc=d3e1928-114920 Reference 4: 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 5: 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=58740216&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 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930 Reference 2: 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=58740216&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=58740216&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 This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2410-114920 + Details
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