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Stock-Based Employee Benefit Plans (Tables) | 12 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Assumptions Used to Estimate Fair Value of Stock Options | We used the following assumptions to estimate the fair value of our stock options during fiscal 2017, 2016 and 2015:
| Year Ended September 30, |
| 2017 |  |  | 2016 |  |  | 2015 |
Stock Options: |  |  |  |  |  |  |  |
Average expected term (years) | 5.00 |  |  | 4.83 |  |  | 4.18 |
Expected volatility (range) | 35.3 | % |  | 35.3 - 36.4 | % |  | 34.5 - 35.3 | %
Weighted average volatility | 35.3 | % |  | 36.0 | % |  | 34.6 | %
Risk-free interest rate (range) | 2.02 | % |  | 1.21 - 1.49 | % |  | 1.33 - 1.48 | %
Average expected dividend yield | 0.07 | % |  | 0.09 | % |  | 0.14 | %
Expected dividend yield (range) | 0.07 | % |  | 0.09 - 0.10 | % |  | 0.11 - 0.14 | %
Summary of Option Activity | The following table summarizes option activity during fiscal 2017:
| Shares |  | Weighted- average Exercise Price |  | Weighted- average Remaining Contractual Term |  | Aggregate Intrinsic Value
| (In thousands) |  |  |  | (In years) |  | (In thousands)
Outstanding at October 1, 2016 | 1,521 |  |  | $ | 52.37 |  |  |  |  |
Granted | 34 |  |  | 128.80 |  |  |  |  |
Exercised | (325 | ) |  | 44.52 |  |  |  |  |
Outstanding at September 30, 2017 | 1,230 |  |  | $ | 56.54 |  |  | 3.12 |  | $ | 103,275 |
Exercisable at September 30, 2017 | 946 |  |  | $ | 50.29 |  |  | 2.74 |  | $ | 85,354 |
Vested and expected to vest at September 30, 2017 | 1,223 |  |  | $ | 56.43 |  |  | 3.11 |  | $ | 102,843 |
Summary of Restricted Stock Unit and Market Stock Unit Activity | The following table summarizes the MSUs activity during fiscal 2017:
| Shares |  | Weighted- average Grant-date Fair Value
| (In thousands) |  |
Outstanding at October 1, 2016 | 142 |  |  | $ | 100.40 |
Granted | 155 |  |  | 108.09 |
Released | (166 | ) |  | 89.09 |
Outstanding at September 30, 2017 | 131 |  |  | $ | 123.82 |
The following table summarizes the RSUs activity during fiscal 2017:
| Shares |  | Weighted-average Grant-date Fair Value
| (In thousands) |  |
Outstanding at October 1, 2016 | 1,211 |  |  | $ | 76.93 |
Granted | 460 |  |  | 122.47 |
Released | (475 | ) |  | 68.54 |
Forfeited | (52 | ) |  | 93.80 |
Outstanding at September 30, 2017 | 1,144 |  |  | $ | 97.95 |
Summary of Performance Stock Unit Activity | The following table summarizes the PSUs activity during fiscal 2017:
| Shares |  | Weighted- average Grant-date Fair Value
| (In thousands) |  |
Outstanding at October 1, 2016 | 230 |  |  | $ | 73.99 |
Granted | 110 |  |  | 121.30 |
Released | (136 | ) |  | 65.24 |
Outstanding at September 30, 2017 | 204 |  |  | $ | 105.37 |
Assumptions Used to Estimate Fair Value of Market Stock Units | We used the following assumptions to estimate the fair value of our MSUs during fiscal 2017, 2016 and 2015:
| Year Ended September 30,
| 2017 |  |  | 2016 |  |  | 2015 |
Expected volatility in FICO’s stock price | 27.4 | % |  | 24.1 | % |  | 26.6 | %
Expected volatility in Russell 3000 Index | 13.6 | % |  | 12.8 | % |  | 12.2 | %
Correlation between FICO and the Russell 3000 Index | 59.8 | % |  | 60.2 | % |  | 55.9 | %
Risk-free interest rate | 1.40 | % |  | 1.25 | % |  | 1.10 | %
Average expected dividend yield | 0.07 | % |  | 0.09 | % |  | 0.14 | %

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -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 number and weighted-average grant date fair value for outstanding performance 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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