Leases - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Lessee, Lease, Description
Operating lease, liability, including sublease receivables	$ 505,100,000		$ 538,600,000
Operating lease, liability	495,114,000
Operating lease, future contracted revenues and sublease income	168,800,000		$ 157,200,000
Operating lease costs	33,400,000	$ 33,800,000
Operating lease payments	33,300,000	33,800,000
Short-term lease expense	500,000	300,000
Sublease income	900,000	900,000
Lease impairment	$ 0	0
Weighted average discount rate	5.30%		5.27%
Weighted average lease term	6 years		6 years 1 month 6 days
Right-of-use assets	$ 416,118,000		$ 447,765,000
Right-of-use liabilities	$ 98,559,000		$ 101,385,000
Operating lease, liability, current, statement of financial position flag	Accounts payable, accrued expenses and other liabilities (see Note 26)		Accounts payable, accrued expenses and other liabilities (see Note 26)
Right-of-use liabilities	$ 406,590,000		$ 437,205,000
Rent expense	45,300,000	$ 41,900,000
Management Services, Servicing Fees and Other
Lessee, Lease, Description
Operating lease, liability	$ 278,600,000		$ 304,100,000
Minimum
Lessee, Lease, Description
Remaining lease terms	1 year
Options to extend leases	1 year
Maximum
Lessee, Lease, Description
Remaining lease terms	16 years
Options to extend leases	10 years