Components of Interest Expense (Detail) - USD ($) |
4 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Interest Expense [Abstract] | ||||
| Interest expense | $ 26,462,000 | $ 31,257,000 | $ 35,811,000 | $ 26,462,000 |
| Amortization of debt issuance costs 2 | 2,736,000 | 3,339,000 | 2,611,000 | |
| Amortization of Debt Discount (Premium) | 680,000 | 811,000 | 743,000 | |
| Interest on borrowings and related fees | 32,164,000 | 29,851,000 | 36,593,000 | |
| Interest Paid, Capitalized, Investing Activities | $ 9,118,000 | 2,744,000 | $ 4,136,000 | |
| Accelerated Deferred Debt Issuance Cost | $ 900,000 | |||
| X | ||||||||||
- Definition Accelerated Deferred Debt Issuance Cost No definition available.
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| X | ||||||||||
- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of amortization expense attributable to debt issuance costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Aggregate amount of interest expense on all borrowings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash paid for interest capitalized, classified as investing activity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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