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Restructuring - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended			3 Months Ended			12 Months Ended
	Feb. 29, 2024	May 31, 2023	Jan. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Severance And Related Costs				$ 7.5	$ 0.6	$ 4.3	$ 0.7
Restructuring Charges		$ 2.3				5.0
ROU asset impairments and accelerated amortization		1.3				3.7
Leasehold impairments		$ 0.6				$ 1.3
Reduction of Workforce Period Percent	3.00%	8.00%	4.00%
Contract termination cost		$ 0.7
Restructuring Reserve							1.3
California [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					0.4		$ 0.4
Capitalized software project writeoff value					$ 0.6

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Contract termination cost.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of impairment loss from capitalized computer software costs.

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The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced.

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Amount of loss from impairment of right-of-use asset from operating lease.

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The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s).

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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