Share-Based Compensation - Summary of RSU's by Vest Date (Detail) - Restricted Stock Units (RSUs) [Member] |
12 Months Ended |
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Dec. 31, 2018
shares
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| RSU's | 1,230,951 |
| March 16, 2020 [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| RSU's | 348,841 |
| January 1, 2021 [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| RSU's | 12,294 |
| March 31, 2022 [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| RSU's | 565,449 |
| January 1, 2023 [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| RSU's | 12,294 |
| March 31, 2024 [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| RSU's | 292,073 |
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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