Stock-Based Compensation - Summary of RSUs/Restricted Stock Granted in Connection with Annual Incentive Compensation under Award Plan (Detail) - shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Restricted Stock and RSUs, Granted | 1,226,249 | ||
| RSUs/Restricted Stock [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Restricted Stock and RSUs, Granted | 674,206 | 527,337 | 699,991 |
| Awards to employees cliff vesting | 377,291 | 209,201 | 277,313 |
| Annual RSUs Granted [Member] | RSUs/Restricted Stock [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Restricted Stock and RSUs, Granted | 1,051,497 | 736,538 | 977,304 |