Long-term Debt - Summary of Debt Instruments (Detail) - USD ($) $ in Thousands |
Sep. 30, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Nov. 12, 2019 |
|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||
| Term Loan – UBS | $ 308,968 | $ 312,215 | ||
| Term Loan – BNP Paribas | 308,968 | 312,215 | ||
| Total | 308,968 | 312,215 | ||
| Less – current portion | $ 3,153 | 3,161 | 3,248 | |
| Less – debt issuance cost | 224 | 7,403 | 9,233 | |
| Total – Long-term, net | $ 378,356 | 298,404 | 299,734 | |
| Term Loan UBS [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Term Loan – UBS | 308,959 | 312,112 | ||
| Term Loan – BNP Paribas | 308,959 | 312,112 | ||
| Total | 308,959 | 312,112 | ||
| Less – debt issuance cost | $ 1,500 | |||
| Term Loan BNP Paribas [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Term Loan – UBS | 9 | 103 | ||
| Term Loan – BNP Paribas | 9 | 103 | ||
| Total | $ 9 | $ 103 |
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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