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Fair Value Measurements (Tables) | 12 Months Ended
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Jan. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract] |
Assets and Liabilities Measured at Fair Value on Recurring Basis | The following tables present the fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis as of January 31, 2017 and 2016 (in thousands):
|  |  | Fair Value at January 31, 2017 |
| Balance Sheet Location |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities | Other current assets |  | $ | 309 |  |  | $ | — |  |  | $ | — |  |  | $ | 309 |
Short-term investment | Other current assets |  |  | 154 |  |  |  | — |  |  |  | — |  |  |  | 154 |
SERP assets - employer | Other non-current assets |  |  | 1,091 |  |  |  | — |  |  |  | — |  |  |  | 1,091 |
SERP assets - employee | Other non-current assets |  |  | 30,831 |  |  |  | — |  |  |  | — |  |  |  | 30,831 |
Hedge derivatives | Other current assets |  |  | — |  |  |  | 145 |  |  |  | — |  |  |  | 145 |
Total |  |  | $ | 32,385 |  |  | $ | 145 |  |  | $ | — |  |  | $ | 32,530 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SERP liabilities - employee | Other non-current liabilities |  | $ | 30,831 |  |  | $ | — |  |  | $ | — |  |  | $ | 30,831 |
Hedge derivatives | Accrued liabilities |  |  | — |  |  |  | 211 |  |  |  | — |  |  |  | 211 |
Total |  |  | $ | 30,831 |  |  | $ | 211 |  |  | $ | — |  |  | $ | 31,042 |
|  |  | Fair Value at January 31, 2016 |
| Balance Sheet Location |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities | Other current assets |  | $ | 268 |  |  | $ | — |  |  | $ | — |  |  | $ | 268 |
SERP assets - employer | Other non-current assets |  |  | 1,168 |  |  |  | — |  |  |  | — |  |  |  | 1,168 |
SERP assets - employee | Other non-current assets |  |  | 24,853 |  |  |  | — |  |  |  | — |  |  |  | 24,853 |
Hedge derivatives | Other current assets |  |  | — |  |  |  | 64 |  |  |  | — |  |  |  | 64 |
Total |  |  | $ | 26,289 |  |  | $ | 64 |  |  | $ | — |  |  | $ | 26,353 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SERP liabilities - employee | Other non-current liabilities |  | $ | 24,853 |  |  | $ | — |  |  | $ | — |  |  | $ | 24,853 |
Hedge derivatives | Accrued liabilities |  |  | — |  |  |  | 1,163 |  |  |  | — |  |  |  | 1,163 |
Total |  |  | $ | 24,853 |  |  | $ | 1,163 |  |  | $ | — |  |  | $ | 26,016 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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