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BUSINESS COMBINATIONS (Details) - USD ($)
12 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Aug. 10, 2017
Business Combinations [Abstract]      
Noncontrolling Interest, Ownership Percentage by Parent     95.35%
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual $ 400,000    
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual 5,600,000    
Business Acquisition, Pro Forma Revenue 452,600,000 $ 453,800,000  
Business Acquisition, Pro Forma Net Income (Loss) $ 40,400,000 $ 29,200,000  
Business Acquisition, Pro Forma Earnings Per Share, Basic (in Dollars per share) $ 6.12 $ 4.43  
Business Acquisition, Pro Forma Earnings Per Share, Diluted (in Dollars per share) $ 6.12 $ 4.43  
Payments to Acquire Businesses, Gross $ 12,049,000    
Business Acquisition, Transaction Costs $ 2,500,000