Long-term Debt - Schedule of Floating Rate Loan Stock, Notes Outstanding (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Amount	$ 54.7	$ 57.0
Floating Rate Loan Stock, U.S. Dollar, Start Year 2004
Debt Instrument [Line Items]
Interest rate	7.26%	4.35%
Amount	$ 6.5	$ 6.5
Floating Rate Loan Stock, U.S. Dollar, Start Year 2006
Debt Instrument [Line Items]
Interest rate	7.06%	4.15%
Amount	$ 10.0	$ 10.0
Floating Rate Loan Stock, U.S. Dollar
Debt Instrument [Line Items]
Amount	$ 16.5	$ 16.5
Floating Rate Loan Stock, Euro, Start Year 2005
Debt Instrument [Line Items]
Interest rate	5.82%	3.44%
Amount	$ 12.7	$ 13.5
Floating Rate Loan Stock, Euro, Start Year 2006
Debt Instrument [Line Items]
Interest rate	5.82%	3.44%
Amount	$ 11.1	$ 11.8
Floating Rate Loan Stock, Euro, Start Year 2007
Debt Instrument [Line Items]
Interest rate	5.95%	3.30%
Amount	$ 14.4	$ 15.2
Floating Rate Loan Stock, Euro
Debt Instrument [Line Items]
Amount	$ 38.2	$ 40.5
London Interbank Offered Rate (LIBOR) | Floating Rate Loan Stock, U.S. Dollar, Start Year 2004
Debt Instrument [Line Items]
Interest rate basis spread	4.20%	4.20%
London Interbank Offered Rate (LIBOR) | Floating Rate Loan Stock, U.S. Dollar, Start Year 2006
Debt Instrument [Line Items]
Interest rate basis spread	4.00%	4.00%
Euribor | Floating Rate Loan Stock, Euro, Start Year 2005
Debt Instrument [Line Items]
Interest rate basis spread	4.00%	4.00%
Euribor | Floating Rate Loan Stock, Euro, Start Year 2006
Debt Instrument [Line Items]
Interest rate basis spread	4.00%	4.00%
Euribor | Floating Rate Loan Stock, Euro, Start Year 2007
Debt Instrument [Line Items]
Interest rate basis spread	3.90%	3.90%