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Stock-based Compensation Plans - TSR - PSUs Activities (Detail) - Performance Based TSR - PSUs
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Summary of Performance Share Unit Awards outstanding, Number of Units  
Outstanding, Beginning Balance | shares 993,452
Granted | shares 610,155 [1]
Outstanding, Ending Balance | shares 1,603,607
Summary of Performance Share Unit Awards outstanding, Weighted Average Grant Date Fair Value  
Outstanding, Beginning Balance, weighted average grant date fair value | $ / shares $ 19.00
Granted, weighted average grant date fair value | $ / shares 3.85 [1]
Outstanding, Ending Balance, weighted average grant date fair value | $ / shares $ 13.23
[1] These amounts reflect the number of performance units granted. The actual payout of shares may be between zero and 200% of the performance units granted depending on the total shareholder return ranking compared to our peer companies at the vesting date.