XML 116 R95.htm IDEA: XBRL DOCUMENT v3.20.4
Share-based Compensation - Schedule of Changes in Time-Based, Performance-Based and Market-Based Restricted Stock Awards and Stock Units (Detail)
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Time-based Restricted Stock Awards and Stock Units [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding at December 31, 2019 | shares 468,728
Granted (in shares) | shares 250,459
Vested and settled (in shares) | shares (178,315)
Cancelled (in shares) | shares (47,745)
Outstanding at December 31, 2020 | shares 493,127
Outstanding at December 31, 2019 | $ / shares $ 51.96
Granted (in dollars per share) | $ / shares 29.93
Vested and settled (in dollars per share) | $ / shares 52.31
Cancelled (in dollars per share) | $ / shares 46.97
Outstanding at December 31, 2020 | $ / shares $ 41.13
Market-based Restricted Stock Units [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Outstanding at December 31, 2019 | shares 257,162
Granted (in shares) | shares 158,238
Vested and settled (in shares) | shares (45,178)
Cancelled (in shares) | shares (94,884)
Outstanding at December 31, 2020 | shares 275,338
Outstanding at December 31, 2019 | $ / shares $ 60.08
Granted (in dollars per share) | $ / shares 44.00
Vested and settled (in dollars per share) | $ / shares 49.53
Cancelled (in dollars per share) | $ / shares 54.64
Outstanding at December 31, 2020 | $ / shares $ 54.45