| Unaudited Interim Condensed Consolidated Statements of Cash Flows Supplemental Information - Summary of Changes in Other Non-Cash Operating Assets and Liabilities (Detail) - USD ($) $ in Thousands | 3 Months Ended | |
|---|---|---|
| Mar. 31, 2021 | Mar. 31, 2020 | |
| Increase (Decrease) in Operating Capital [Abstract] | ||
| Decrease (increase) in accounts receivables | $ (1,009) | $ (344) | 
| Decrease (increase) in prepaid expenses | (1,028) | (790) | 
| Decrease (increase) in inventories | (723) | (2,823) | 
| Decrease (increase) in other assets | (719) | (54) | 
| Increase (decrease) in accounts payable | 1,930 | (3,974) | 
| Increase (decrease) in accrued and other liabilities | 6,341 | 11,458 | 
| Total | $ 4,792 | $ 3,473 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in obligations incurred but not paid, and operating obligations classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in receivables, and operating assets classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in accrued expenses, and obligations classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in inventory, and assets classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- References No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in current assets classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in current operating assets after deduction of current operating liabilities classified as other. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount of increase (decrease) in prepaid expenses, and assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
 |