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Debt - Schedule of Debt Obligations (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Mar. 31, 2021	Apr. 30, 2018
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate on debt	0.25%	0.25%	0.25%
2018 Term Debt [Member]
Debt Instrument [Line Items]
Interest rate on debt		8.00%
2024 Term Debt [Member]
Debt Instrument [Line Items]
Interest rate on debt	7.80%
2018 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available capacity	$ 300.0			$ 300.0
2018 Revolving Credit Facility [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Available capacity		$ 1.3
2024 Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Available capacity	350.0			$ 350.0
2024 Revolving Credit Facility [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Available capacity		0.9
Line of Credit [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Available capacity	$ 0.5	$ 0.5