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Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss (Tables) | 9 Months Ended
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Oct. 31, 2019
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 nine months ended October 31, 2019 and 2018:
|  | Three Months Ended October 31, 2019 |  |  | Nine Months Ended October 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 |  | $ | (37,496 | ) |  | $ | 209 |  |  | $ | (37,287 | ) |  | $ | (26,925 | ) |  | $ | (178 | ) |  | $ | (27,103 | )
Other comprehensive income (loss) before reclassifications |  |  | 7,420 |  |  |  | 170 |  |  |  | 7,590 |  |  |  | (3,151 | ) |  |  | 531 |  |  |  | (2,620 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | — |  |  |  | 6 |  |  |  | 6 |  |  |  | — |  |  |  | 32 |  |  |  | 32 |
Net current-period other comprehensive income (loss) |  |  | 7,420 |  |  |  | 176 |  |  |  | 7,596 |  |  |  | (3,151 | ) |  |  | 563 |  |  |  | (2,588 | )
Balance at end of period |  | $ | (30,076 | ) |  | $ | 385 |  |  | $ | (29,691 | ) |  | $ | (30,076 | ) |  | $ | 385 |  |  | $ | (29,691 | )
|  | Three Months Ended October 31, 2018 |  |  | Nine Months Ended October 31, 2018 |
|  |  |  |  |  | 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 |  | $ | (26,190 | ) |  | $ | (411 | ) |  | $ | (26,601 | ) |  | $ | (10,340 | ) |  | $ | (311 | ) |  | $ | (10,651 | )
Other comprehensive income (loss) before reclassifications |  |  | (5,358 | ) |  |  | (131 | ) |  |  | (5,489 | ) |  |  | (21,208 | ) |  |  | (218 | ) |  |  | (21,426 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | — |  |  |  | (3 | ) |  |  | (3 | ) |  |  | — |  |  |  | (16 | ) |  |  | (16 | )
Net current-period other comprehensive income (loss) |  |  | (5,358 | ) |  |  | (134 | ) |  |  | (5,492 | ) |  |  | (21,208 | ) |  |  | (234 | ) |  |  | (21,442 | )
Balance at end of period |  | $ | (31,548 | ) |  | $ | (545 | ) |  | $ | (32,093 | ) |  | $ | (31,548 | ) |  | $ | (545 | ) |  | $ | (32,093 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: 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=118930883&loc=SL7669686-108580 + Details
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