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Stock-Based Compensation (Tables) | 9 Months Ended
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Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
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﻿ | Three-Months Ended |  | Nine-Months Ended
﻿ | June 30, |  | June 30,
﻿ | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Weighted-average exercise price per share |  | n/a |  |  |  | n/a |  |  | $ | 78.91 |  |  | $ | 62.64 |
﻿Weighted-average grant date market value of Woodward stock |  | n/a |  |  |  | n/a |  |  | $ | 78.91 |  |  | $ | 69.45 |
﻿Expected term (years) |  | n/a |  |  |  | n/a |  |  |  | 6.4 | - | 8.7 |  |  |  | 6.0 | - | 8.7 |
﻿Estimated volatility |  | n/a |  |  |  | n/a |  |  |  | 29.1% | - | 32.7% |  |  |  | 31.5% | - | 33.7% |
﻿Estimated dividend yield |  | n/a |  |  |  | n/a |  |  |  | 0.6% | - | 0.8% |  |  |  | 0.7% |
﻿Risk-free interest rate |  | n/a |  |  |  | n/a |  |  |  | 2.1% | - | 2.8% |  |  |  | 2.2% | - | 2.5% |
﻿
Activity for Stock Option Awards |
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﻿ |  | Three-Months Ended |  | Nine-Months Ended
﻿ |  | June 30, 2018 |  | June 30, 2018
﻿ |  | Number of options |  | Weighted-Average Exercise Price per Share |  | Number of options |  | Weighted-Average Exercise Price per Share
﻿Options, beginning balance |  |  | 5,880 |  | $ | 44.62 |  |  | 5,236 |  | $ | 39.58
﻿Options granted |  |  | - |  |  | n/a |  |  | 750 |  |  | 78.91
﻿Options exercised |  |  | (158) |  |  | 22.32 |  |  | (255) |  |  | 27.81
﻿Options forfeited |  |  | (15) |  |  | 59.97 |  |  | (24) |  |  | 58.27
﻿Options, ending balance |  |  | 5,707 |  |  | 45.20 |  |  | 5,707 |  |  | 45.20
﻿
Stock Options Vested, Or Expected to Vest and Are Exercisable |
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﻿ |  | Number |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Life in Years |  | Aggregate Intrinsic Value
﻿Options outstanding |  |  | 5,707 |  | $ | 45.20 |  |  | 5.8 |  | $ | 182,230
﻿Options vested and exercisable |  |  | 3,699 |  |  | 36.25 |  |  | 4.5 |  |  | 150,207
﻿Options vested and expected to vest |  |  | 5,628 |  |  | 44.89 |  |  | 5.7 |  |  | 181,384
﻿
Stock Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Changes in Nonvested Stock Options |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three-Months Ended |  | Nine-Months Ended
﻿ |  | June 30, 2018 |  | June 30, 2018
﻿ |  | Number of options |  | Weighted-Average Grant Date Fair Value per Share |  | Number of options |  | Weighted-Average Grant Date Fair Value Per Share
﻿Options outstanding, beginning balance |  |  | 2,022 |  | $ | 21.63 |  |  | 2,072 |  | $ | 18.61
﻿Options granted |  |  | - |  |  | n/a |  |  | 750 |  |  | 25.66
﻿Options vested |  |  | - |  |  | n/a |  |  | (791) |  |  | 17.57
﻿Options forfeited |  |  | (15) |  |  | 20.85 |  |  | (24) |  |  | 20.45
﻿Options outstanding, ending balance |  |  | 2,007 |  |  | 21.64 |  |  | 2,007 |  |  | 21.64
﻿

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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