Long-Term Debt - Additional Information (Detail)						12 Months Ended
	May 06, 2025 USD ($)	Apr. 01, 2025 USD ($)	Jun. 29, 2023 USD ($)	Jan. 05, 2023 USD ($)	Jan. 04, 2019	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 GBP (£)	Jul. 01, 2021 USD ($)
Debt Instrument [Line Items]
Weighted-average revolver interest rate						4.56%			4.56%
Line of credit facility, accordion feature						$ 500,000,000
Amounts due within one year						8,225,000	$ 26,391,000
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						8,200,000
Maturity obligation, year two						33,200,000
Maturity obligation, year three						33,200,000
Maturity obligation, year four						8,200,000
Maturity obligation, year five						293,500,000
Maturity obligation, thereafter						208,200,000
Proceeds from lines of credit						9,700,000
Restricted cash balances						900,000	500,000
Long-term debt						580,934,000	508,013,000
Acquisition, net of cash acquired						189,275,000	0	$ 0
M&C
Debt Instrument [Line Items]
Acquisition, net of cash acquired	$ 189,000,000
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%
Principal amount due in year before maturity			$ 25,000,000
Principal amount due at maturity			$ 25,000,000
Long-term debt						$ 49,967,000	49,953,000
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						$ 49,300,000			£ 36,600,000
Debt instrument, stated interest rate percentage						3.40%			3.40%
Amounts due within one year						$ 8,200,000			£ 6,100,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,300,000,000
Remaining borrowing capacity						1,000,000,000
Line of Credit | Revolving Credit Facility | M&C
Debt Instrument [Line Items]
Amount financed including cash	$ 137,300,000
Line of Credit | Term Loan Facility 2023 | Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 250,000,000
Long-term debt						$ 0	$ 205,152,000
Overnight Bank Funding Rate | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		0.50%
Secured Overnight Financing Rate (SOFR) | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		1.00%
Minimum | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		0.00%
Minimum | Line of Credit | Term Loan Facility 2023 | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage				0.00%
Maximum | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		1.75%
Maximum | Line of Credit | Term Loan Facility 2023 | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage				2.00%