Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Stock-Based Compensation - Restricted Stock Unit Activity (Detail)

v3.19.1
Stock-Based Compensation - Restricted Stock Unit Activity (Detail) - $ / shares
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Non-vested restricted stock units, Beginning balance (in shares) 4,137,592 3,340,245
Granted, Restricted Stock Units (in shares) 1,714,094 1,779,904
Vested, Restricted Stock Units (in shares) (745,787) (615,334)
Forfeited, Restricted Stock Units (in shares) (844,391) (367,223)
Non-vested restricted stock units, Ending balance (in shares) 4,261,508 4,137,592
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]    
Weighted Average Fair Value at Grant Date, Non-vested, Beginning balance (in dollars per share) $ 14.63 $ 14.80
Weighted Average Fair Value at Grant Date, Granted (in dollars per share) 14.12 14.04
Weighted Average Fair Value at Grant Date, Vested (in dollars per share) 15.53 12.05
Weighted Average Fair Value at Grant Date, Forfeited (in dollars per share) 13.71 14.12
Weighted Average Fair Value at Grant Date, Non-vested, Ending balance (in dollars per share) $ 14.47 $ 14.63