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REVENUES FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2019 | Oct. 31, 2018
Disaggregation of Revenues |  |  |  |
Revenues earned under fixed-price (as percent) |  |  | 76.00% | 91.00%
Totals | $ 58,406 | $ 116,459 | $ 171,009 | $ 394,495
United States |  |  |  |
Disaggregation of Revenues |  |  |  |
Totals | 39,629 | 87,892 | 117,045 | 320,985
United Kingdom |  |  |  |
Disaggregation of Revenues |  |  |  |
Totals | 10,349 | 19,708 | 35,631 | 53,866
Republic of Ireland |  |  |  |
Disaggregation of Revenues |  |  |  |
Totals | 8,256 | 8,698 | 18,007 | 18,857
Other |  |  |  |
Disaggregation of Revenues |  |  |  |
Totals | $ 172 | $ 161 | $ 326 | $ 787

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