Annual report pursuant to Section 13 and 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Narrative (Details)

v3.20.1
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related to stock options $ 6,748 $ 3,409 $ 5,394
Unvested restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares outstanding (in shares) 986 1,313  
Compensation expense related to stock options $ 3,610 $ 3,178 5,004
Awards vested, fair value $ 4,000 $ 5,100 $ 4,800
Granted (in shares) 645 1,000 1,500
Restricted stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Unrecognized compensation cost related to stock options granted $ 1,400    
Weighted-average period for recognition 1 year 11 days    
ESPP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized (in shares) 9,700    
Common stock purchase price, percentage 85.00%    
Shares available for future equity grants (in shares) 1,397 497 497
Market (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to stock options granted $ 4,900    
Weighted-average period for recognition 1 year 2 months 23 days    
Granted (in shares) 1,500 700 500
Market (PSUs) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Market (PSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Performance PSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 300 0 400
Performance share units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares outstanding (in shares) 1,944 770  
Compensation expense related to stock options $ 3,103 $ 274 $ (171)
Awards vested, fair value $ 600 $ 100 $ 700
Granted (in shares) 1,807    
2012 Long-Term Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total shares reserved for future issuance (in shares)   6,300  
2012 Long-Term Incentive Plan | Stock options, PSUs, and Restricted Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total shares reserved for future issuance (in shares) 3,600 2,700  
2012 Long-Term Incentive Plan | Unvested restricted stock units | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
2012 Long-Term Incentive Plan | Unvested restricted stock units | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
2012 Long-Term Incentive Plan | Restricted stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Plan term 7 years    
Other Stock Incentive Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future equity grants (in shares) 300    
Shares outstanding (in shares) 250