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Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 30, 2020 | Apr. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | $ 1,290,672 | $ 1,189,009
Equity awards exercised/vested, net |  | 40
Share-based compensation expense | (811) | 4,227
Taxes paid for net share settlements | (306) | (5,686)
Other comprehensive loss, net | (4,026) | (3,227)
Net income (loss) | (39,295) | 12,043
Balance at end of period | 1,246,234 | 1,186,826
Common Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | 264 | 264
Balance at end of period | 264 | 264
Additional Paid-in Capital |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | 452,142 | 464,112
Equity awards exercised/vested, net | (1,185) | (5,818)
Share-based compensation expense | (811) | 4,227
Taxes paid for net share settlements | (306) | (5,686)
Balance at end of period | 449,840 | 456,835
Accumulated Other Comprehensive Loss |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | (18,008) | (15,194)
Other comprehensive loss, net | (4,026) | (3,227)
Balance at end of period | (22,034) | (18,421)
Retained Earnings |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | 893,138 | 758,881
Net income (loss) | (39,295) | 12,043
Balance at end of period | 853,843 | 761,344
Common Stock Held in Treasury |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | (36,864) | (19,054)
Equity awards exercised/vested, net | 1,185 | 5,858
Balance at end of period | $ (35,679) | $ (13,196)

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