BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - GOODWILL, INTANGIBLE ASSETS, AND OTHER LONG_LIVED ASSETS (Details) - Maximum
3 Months Ended
Apr. 30, 2018
Goodwill Impairment Testing  
Impairment Test Number of Primary Approaches to Assess Fair Value 3
Finite-Lived Intangible Asset, Useful Life 10 years