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Derivative Financial Instruments (Tables) | 6 Months Ended
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Jul. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Fair Value and Presentation of Derivatives | The following table summarizes the fair value and presentation in the Consolidated Balance Sheets for derivatives (in thousands):
|  | Asset Derivatives |  |  | Liability Derivatives |
|  | Balance Sheet Location |  | July 31, 2018 Fair Value |  |  | January 31, 2018 Fair Value |  |  | July 31, 2017 Fair Value |  |  | Balance Sheet Location |  | July 31, 2018 Fair Value |  |  | January 31, 2018 Fair Value |  |  | July 31, 2017 Fair Value |
Derivatives not designated as hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Exchange Contracts |  | Other Current Assets |  | $ | — |  |  | $ | 544 |  |  | $ | 402 |  |  | Accrued Liabilities |  | $ | 481 |  |  | $ | 2 |  |  | $ | 25 |
Total Derivative Instruments |  |  |  | $ | — |  |  | $ | 544 |  |  | $ | 402 |  |  |  |  | $ | 481 |  |  | $ | 2 |  |  | $ | 25 |
|  | Asset Derivatives |  |  | Liability Derivatives |
|  | Balance Sheet Location |  | July 31, 2018 Fair Value |  |  | January 31, 2018 Fair Value |  |  | July 31, 2017 Fair Value |  |  | Balance Sheet Location |  | July 31, 2018 Fair Value |  |  | January 31, 2018 Fair Value |  |  | July 31, 2017 Fair Value |
Derivatives designated as hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Exchange Contracts |  | Other Current Assets |  | $ | 161 |  |  | $ | — |  |  | $ | — |  |  | Accrued Liabilities |  | $ | — |  |  | $ | 44 |  |  | $ | 464 |
Total Derivative Instruments |  |  |  | $ | 161 |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | — |  |  | $ | 44 |  |  | $ | 464 |

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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