Annual report pursuant to Section 13 and 15(d)

Equity Compensation Plans - Stock Option Awards (Detail)

v3.20.1
Equity Compensation Plans - Stock Option Awards (Detail) - $ / shares
shares in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Outstanding, Shares Under Option, Beginning Balance 39 69 69
Exercised, Shares Under Option (2) (19)
Cancelled, Shares Under Option   (11)  
Outstanding, Shares Under Option, Ending Balance 37 39 69
Vested or expected to vest, Shares Under Option 37    
Exercisable, Shares Under Option 37    
Outstanding, Weighted Average Exercise Price, Beginning Balance $ 18.76 $ 20.26 $ 20.26
Exercised, Weighted Average Exercise Price 15.25 15.89
Cancelled, Weighted Average Exercise Price   33.02  
Outstanding, Weighted Average Exercise Price, Ending Balance 18.92 $ 18.76 $ 20.26
Vested or expected to vest, Weighted Average Exercise Price 18.92    
Exercisable, Weighted Average Exercise Price $ 18.92    
Outstanding, Weighted Average Remaining Contractual Term, Ending Balance 2 years 25 days    
Vested or expected to vest, Weighted Average Remaining Contractual Term 2 years 25 days    
Exercisable, Weighted Average Remaining Contractual Term 2 years 25 days