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Financial Assets and Liabilities (Tables) | 9 Months Ended
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Jul. 31, 2019
Financial Assets And Liabilities [Abstract] |
Summary of Available-for-Sale Securities | As of July 31, 2019, the balances of the Company's cash equivalents are:
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses Less Than 12 Continuous Months |  | Gross Unrealized Losses 12 Continuous Months or Longer |  | Estimated Fair Value(1)
| (in thousands)
Cash equivalents: |  |  |  |  |  |  |  |  |
Money market funds | $ | 130,437 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 130,437 |
Total: | $ | 130,437 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 130,437 |
(1) | See Note 5. Fair Value Measures for further discussion on fair values of cash equivalents.
As of October 31, 2018, the balances of the Company's cash equivalents are:
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses Less Than 12 Continuous Months |  | Gross Unrealized Losses 12 Continuous Months or Longer |  | Estimated Fair Value(1)
| (in thousands)
Cash equivalents: |  |  |  |  |  |  |  |  |
Money market funds | $ | 165,296 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 165,296 |
Total: | $ | 165,296 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 165,296 |
(1) See Note 5. Fair Value Measures for further discussion on fair values of cash equivalents.
Schedule of Cash, Cash Equivalents and Restricted Cash | The following table provides a reconciliation of cash, cash equivalents and restricted cash included in the unaudited condensed consolidated balance sheets:
| As of July 31, 2019 |  | As of October 31, 2018
| (in thousands)
Cash and cash equivalents | $ | 686,780 |  |  | $ | 723,115 |
Restricted cash included in Prepaid expenses and other current assets | 1,171 |  |  | 1,164 |
Restricted cash included in Other long-term assets | 730 |  |  | 722 |
Total cash, cash equivalents and restricted cash | $ | 688,681 |  |  | $ | 725,001 |
Effects on Changes in Fair Values of Non-Designated Forward Contracts | The effect of the changes in the fair values of non-designated forward contracts is summarized as follows:
| Three Months Ended July 31, |  | Nine Months Ended July 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands)
Gain (loss) recorded in other income (expense), net | $ | 1,179 |  |  | $ | 1,567 |  |  | $ | 4,314 |  |  | $ | 1,244 |
Notional Amounts of Derivative Instruments | The notional amounts in the table below for derivative instruments provide one measure of the transaction volume outstanding:
| As of July 31, 2019 |  | As of October 31, 2018
| (in thousands)
Total gross notional amount | $ | 779,127 |  |  | $ | 1,135,549 |
Net fair value | $ | (565 | ) |  | $ | (18,120 | )
Fair Values of Derivative Instrument Designated and Non-Designated as Hedging Instruments in Balance Sheet | The following table represents the unaudited condensed consolidated balance sheet location and amount of derivative instrument fair values segregated between designated and non-designated hedge instruments:
| Fair values of derivative instruments designated as hedging instruments |  | Fair values of derivative instruments not designated as hedging instruments
| (in thousands)
As of July 31, 2019 |  |  |
Other current assets | $ | 6,487 |  |  | $ | 77 |
Accrued liabilities | $ | 7,020 |  |  | $ | 109 |
As of October 31, 2018 |  |  |
Other current assets | $ | 4,771 |  |  | $ | 131 |
Accrued liabilities | $ | 22,890 |  |  | $ | 132 |
Income Statement Location and Amount of Gains and Losses on Derivative Instrument Fair Values for Designated Hedge Instruments, Net of Tax | The following table represents the unaudited condensed consolidated statement of operations location and amount of gains and losses on derivative instrument fair values for designated hedge instruments, net of tax:
| Location of gain (loss) recognized in OCI on derivatives |  | Amount of gain (loss) recognized in OCI on derivatives (effective portion) |  | Location of gain (loss) reclassified from OCI |  | Amount of gain (loss) reclassified from OCI (effective portion)
| (in thousands)
Three months ended July 31, 2019 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | (994 | ) |  | Revenue |  | $ | 685 |
Foreign exchange contracts | Operating expenses |  | (76 | ) |  | Operating expenses |  | (3,945 | )
Total |  |  | $ | (1,070 | ) |  |  |  | $ | (3,260 | )
Three months ended July 31, 2018 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | 1,422 |  |  | Revenue |  | $ | (308 | )
Foreign exchange contracts | Operating expenses |  | (13,793 | ) |  | Operating expenses |  | 1,970 |
Total |  |  | $ | (12,371 | ) |  |  |  | $ | 1,662 |
Nine months ended July 31, 2019 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | (253 | ) |  | Revenue |  | $ | 1,048 |
Foreign exchange contracts | Operating expenses |  | 5,097 |  |  | Operating expenses |  | (12,795 | )
Total |  |  | $ | 4,844 |  |  |  |  | $ | (11,747 | )
Nine months ended July 31, 2018 |  |  |  |  |  |  |
Foreign exchange contracts | Revenue |  | $ | (542 | ) |  | Revenue |  | $ | 1,190 |
Foreign exchange contracts | Operating expenses |  | (7,349 | ) |  | Operating expenses |  | 11,320 |
Total |  |  | $ | (7,891 | ) |  |  |  | $ | 12,510 |
Ineffective Portion and Portion Excluded from Effectiveness Testing of Derivative Hedge Gains (Losses) | The following table represents the ineffective portions and portions excluded from effectiveness testing of the hedge gains (losses) for derivative instruments designated as hedging instruments, which are recorded in other income (expense), net:
Foreign exchange contracts | Amount of gain (loss) recognized in statement of operations on derivatives (ineffective portion)(1) |  | Amount of gain (loss) recognized in statement of operations on derivatives (excluded from effectiveness testing)(2)
| (in thousands)
For the three months ended July 31, 2019 | $ | 232 |  |  | $ | 1,077 |
For the three months ended July 31, 2018 | $ | (132 | ) |  | $ | 782 |
For the nine months ended July 31, 2019 | $ | 148 |  |  | $ | 358 |
For the nine months ended July 31, 2018 | $ | 389 |  |  | $ | 2,488 |
(1) | The ineffective portion includes forecast inaccuracies.
(2) The portion excluded from effectiveness testing includes the discount earned or premium paid for the contracts.

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