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Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | $ 440,552 |
Other comprehensive income / (loss) before reclassifications |  | 7,989 | $ (30,349)
Amounts reclassified from accumulated other comprehensive income | [1] | 286 |
Net current-period other comprehensive income / (loss) |  | 8,275 | (30,349)
Ending Balance |  | 473,993 | 440,552
Currency Translation Adjustments |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | 68,265 | 98,642
Other comprehensive income / (loss) before reclassifications |  | 8,389 | (30,377)
Amounts reclassified from accumulated other comprehensive income | [1] | (85) |
Net current-period other comprehensive income / (loss) |  | 8,304 | (30,377)
Ending Balance |  | 76,569 | 68,265
Available-for-sale securities |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | 189 | 211
Other comprehensive income / (loss) before reclassifications |  | 8 | (22)
Net current-period other comprehensive income / (loss) |  | 8 | (22)
Ending Balance |  | 197 | 189
Hedging Contracts |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | 51 | 1
Other comprehensive income / (loss) before reclassifications |  | (408) | 50
Amounts reclassified from accumulated other comprehensive income | [1] | 371 |
Net current-period other comprehensive income / (loss) |  | (37) | 50
Ending Balance |  | 14 | 51
Accumulated Other Comprehensive Income |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |
Beginning Balance |  | 68,505 | 98,854
Ending Balance |  | $ 76,780 | $ 68,505
[1] | Amounts in fiscal 2017 and 2016 were reclassified to earnings in the Consolidated Statements of Operations.

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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