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STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 10, 2018
Jun. 07, 2018
May 07, 2018
Nov. 30, 2018
Nov. 30, 2018
Jul. 16, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock repurchase program, authorized amount     $ 30,000,000     $ 39,000,000
Share repurchase program period     12 months      
Number of shares repurchased       500,000    
Average cost per share       $ 19.85    
Stock repurchased cost       $ 10,400,000 $ 39,000,000  
Stock repurchase program, authorized amount utilized       39,000,000 39,000,000  
Issuance of common stock under ESPP   1,750,000        
Unrecognized share-based compensation cost       $ 29,200,000 $ 29,200,000  
Unrecognized compensation cost, recognition period         3 years 4 months 24 days  
Subsequent Event [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share repurchase program period 12 months          
Subsequent Event [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock repurchase program, authorized amount $ 20,000,000