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Long-Term Debt - Additional Information (Detail) | Jun. 29, 2023 USD ($) | Jan. 05, 2023 USD ($) | May 24, 2021 USD ($) | Jan. 04, 2019 | Dec. 31, 2024 USD ($) | Dec. 31, 2024 GBP (£) | Dec. 31, 2023 USD ($) | Jul. 01, 2021 USD ($)
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 900,000,000 |  |  |  |  |
Line of credit facility, accordion feature |  |  |  |  | $ 400,000,000 |  |  |
Amounts due within one year |  |  |  |  | 26,391,000 |  | $ 26,522,000 |
Minimum fixed charges coverage ratio (not less than) |  |  |  | 1.50 |  |  |  |
Maximum consolidated leverage ratio (not to exceed) |  |  |  | 3.50 |  |  |  |
Consolidated leverage ratio (not more than) |  |  |  | 4.00 |  |  |  |
Maturity obligation, year one |  |  |  |  | 26,400,000 |  |  |
Maturity obligation, year two |  |  |  |  | 195,100,000 |  |  |
Maturity obligation, year three |  |  |  |  | 32,600,000 |  |  |
Maturity obligation, year four |  |  |  |  | 32,600,000 |  |  |
Maturity obligation, year five |  |  |  |  | 7,600,000 |  |  |
Maturity obligation, thereafter |  |  |  |  | 215,300,000 |  |  |
Proceeds from lines of credit |  |  |  |  | 9,500,000 |  |  |
Restricted cash balances |  |  |  |  | 500,000 |  | 2,000,000.0 |
Long-term Debt |  |  |  |  | 508,013,000 |  | 601,692,000 |
Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from lines of credit |  |  |  |  | $ 1,500,000 |  |  |
Series C Senior Notes Due July 2036 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  | 2.69% | 2.69% |  |
Series A Senior Notes Due 2036 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  | 2.69% | 2.69% |  |
Senior Notes | Series C Senior Notes Due July 2036 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 100,000,000
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 2.69%
Senior Notes | Series A Senior Notes Due 2036 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 100,000,000
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 2.69%
Senior Notes | NYL Note Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  | $ 200,000,000
Senior Notes | Senior Notes Due 2028 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount | $ 50,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage | 5.25% |  |  |  | 5.25% | 5.25% |  |
Debt Instrument, Principal Amount Due In Year Before Maturity | $ 25,000,000 |  |  |  |  |  |  |
Debt Instrument, Principal Amount Due At Maturity | $ 25,000,000 |  |  |  |  |  |  |
Long-term Debt |  |  |  |  | $ 49,953,000 |  | 49,939,000 |
Unsecured Debt | Series C Senior Notes Due July 2036 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  | $ 335,000,000
Notes Payable | Multi-currency Notes Due in 2031 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  | $ 53,500,000 | £ 42,700,000 |  |
Debt instrument, stated interest rate percentage |  |  |  |  | 3.40% | 3.40% |  |
Amounts due within one year |  |  |  |  | $ 7,600,000 | £ 6,100,000 |  |
Line of Credit | Term Loan Facility 2023 | Secured Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  | 5.56% | 5.56% |  |
Long-term Debt |  | $ 250,000,000 |  |  | $ 205,152,000 |  | $ 230,604,000 |
Base Rate | Senior Revolving Credit Facility Maturing in 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin, percentage |  |  | 0.00% |  |  |  |  |
Overnight Bank Funding Rate | Senior Revolving Credit Facility Maturing in 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin, percentage |  |  | 0.50% |  |  |  |  |
Secured Overnight Financing Rate (SOFR) | Senior Revolving Credit Facility Maturing in 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin, percentage |  |  | 1.00% |  |  |  |  |
Minimum | Senior Revolving Credit Facility Maturing in 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin, percentage |  |  | 0.00% |  |  |  |  |
Minimum | Line of Credit | Term Loan Facility 2023 | Secured Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread On EBITDA Leverage Ratio And Elected Rate |  | 0.00% |  |  |  |  |  |
Maximum | Senior Revolving Credit Facility Maturing in 2026 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin, percentage |  |  | 1.75% |  |  |  |  |
Maximum | Line of Credit | Term Loan Facility 2023 | Secured Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread On EBITDA Leverage Ratio And Elected Rate |  | 20000.00% |  |  |  |  |  |

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