XML 101 R77.htm IDEA: XBRL DOCUMENT v3.20.1
Stock-based Compensation Plans - PS/RS-PSUs Activities (Detail) - Performance-based PS-PSUs and RS-PSUs
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding, Beginning Balance | shares 881,573
Granted | shares 777,847 [1]
Outstanding, Ending Balance | shares 1,659,420
Outstanding, Beginning Balance, weighted average grant date fair value | $ / shares $ 11.70
Granted, weighted average grant date fair value | $ / shares 2.33 [1]
Outstanding, Ending Balance, weighted average grant date fair value | $ / shares $ 5.50
[1] Amounts granted reflect the number of performance units granted; however, the actual payout of shares will be between zero and 200% depending on achievement of specifically identified performance targets