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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Jul. 31, 2019
Accounting Policies [Abstract] |
Schedule of foreign currency translation | The cumulative effects of foreign currency exchange rate fluctuations were as follows (in thousands):
Cumulative loss on foreign currency translation as of July 31, 2017 |  | $ | (100,676 | )
Loss on foreign currency translation |  | (7,252 | )
Cumulative loss on foreign currency translation as of July 31, 2018 |  | $ | (107,928 | )
Loss on foreign currency translation |  | (24,601 | )
Cumulative loss on foreign currency translation as of July 31, 2019 |  | $ | (132,529 | )
Schedule of fair value assumptions | The fair value of each option was estimated on the measurement date using the Black-Scholes Merton (BSM) option-pricing model utilizing the following assumptions:
|  | July 31,
|  | 2019 |  | 2018 |  | 2017
Expected life (in years) |  | 5.3 – 6.6 |  |  | 5.3 – 6.9 |  |  | 5.5 – 7.4 |
Risk-free interest rate |  | 1.80 – 2.69 |  |  | 1.88 – 2.62 |  |  | 1.20 – 2.07 |
Estimated volatility |  | 21.6 – 22.1 |  |  | 19.7 – 20.7 |  |  | 20.0 – 22.7 |
Expected dividends |  | — | % |  | — | % |  | — | %
Weighted average fair value at measurement date |  | $ | 15.47 |  |  | $ | 8.88 |  |  | $ | 7.05 |

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- Definition Tabular disclosure of foreign currency exchange rate fluctuations. + References No definition available. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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