Leases - Narrative (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Nov. 28, 2023 office	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Operating lease, weighted average remaining lease term	5 years 1 month 6 days	5 years 1 month 6 days		5 years
Operating lease, weighted average discount rate, percent	5.20%	5.20%		4.00%
Number of offices expected to close | office			14
Impairment charges on operating lease assets	$ 15,600,000	$ 16,500,000
Lessee, operating lease, lease not yet commenced, undiscounted amount	$ 0	$ 0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease renewal term	1 year	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease term	9 years	9 years
Operating lease renewal term	5 years	5 years
Operating lease termination period		5 years