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Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss (Tables) | 6 Months Ended
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Jul. 31, 2020
Equity [Abstract] |
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax | The following tables present the changes in “Accumulated other comprehensive loss,” by component, net of tax, for the three and six months ended July 31, 2020 and 2019:
|  | Three Months Ended July 31, 2020 |  |  | Six Months Ended July 31, 2020 |
|  |  |  |  |  | Unrealized Gains |  |  |  |  |  |  |  |  |  |  | Unrealized Gains |  |  |  |  |
|  | Foreign |  |  | and (Losses) on |  |  |  |  |  |  | Foreign |  |  | and (Losses) on |  |  |  |  |
|  | Currency |  |  | Available-for- |  |  |  |  |  |  | Currency |  |  | Available-for- |  |  |  |  |
|  | Translation |  |  | Sale Securities |  |  | Total |  |  | Translation |  |  | Sale Securities |  |  | Total |
Balance at beginning of period |  | $ | (40,945 | ) |  | $ | 20 |  |  | $ | (40,925 | ) |  | $ | (28,328 | ) |  | $ | 324 |  |  | $ | (28,004 | )
Other comprehensive income (loss) before reclassifications |  |  | 11,765 |  |  |  | (77 | ) |  |  | 11,688 |  |  |  | (852 | ) |  |  | 73 |  |  |  | (779 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | — |  |  |  | 34 |  |  |  | 34 |  |  |  | — |  |  |  | (420 | ) |  |  | (420 | )
Net current-period other comprehensive income (loss) |  |  | 11,765 |  |  |  | (43 | ) |  |  | 11,722 |  |  |  | (852 | ) |  |  | (347 | ) |  |  | (1,199 | )
Balance at end of period |  | $ | (29,180 | ) |  | $ | (23 | ) |  | $ | (29,203 | ) |  | $ | (29,180 | ) |  | $ | (23 | ) |  | $ | (29,203 | )
|  | Three Months Ended July 31, 2019 |  |  | Six Months Ended July 31, 2019 |
|  |  |  |  |  | Unrealized Gains |  |  |  |  |  |  |  |  |  |  | Unrealized Gains |  |  |  |  |
|  | Foreign |  |  | and (Losses) on |  |  |  |  |  |  | Foreign |  |  | and (Losses) on |  |  |  |  |
|  | Currency |  |  | Available-for- |  |  |  |  |  |  | Currency |  |  | Available-for- |  |  |  |  |
|  | Translation |  |  | Sale Securities |  |  | Total |  |  | Translation |  |  | Sale Securities |  |  | Total |
Balance at beginning of period |  | $ | (30,725 | ) |  | $ | 8 |  |  | $ | (30,717 | ) |  | $ | (26,925 | ) |  | $ | (178 | ) |  | $ | (27,103 | )
Other comprehensive income (loss) before reclassifications |  |  | (6,771 | ) |  |  | 182 |  |  |  | (6,589 | ) |  |  | (10,571 | ) |  |  | 361 |  |  |  | (10,210 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | — |  |  |  | 19 |  |  |  | 19 |  |  |  | — |  |  |  | 26 |  |  |  | 26 |
Net current-period other comprehensive income (loss) |  |  | (6,771 | ) |  |  | 201 |  |  |  | (6,570 | ) |  |  | (10,571 | ) |  |  | 387 |  |  |  | (10,184 | )
Balance at end of period |  | $ | (37,496 | ) |  | $ | 209 |  |  | $ | (37,287 | ) |  | $ | (37,496 | ) |  | $ | 209 |  |  | $ | (37,287 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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