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Leases - Narrative (Details) - USD ($)
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Lessee, Lease, Description      
Operating lease, liability, including sublease receivables $ 751,100,000    
Operating lease, liability 740,108,000   $ 712,849,000
Operating lease, liability, portion ring-fenced by special purpose vehicles 36,600,000    
Operating lease, future contracted revenues and sublease income 197,000,000    
Operating lease costs 33,900,000 $ 28,800,000  
Operating lease payments 29,900,000 27,700,000  
Short-term lease expense 200,000 300,000  
Sublease income 800,000 10,000.00  
Lease impairment $ 0 0  
Weighted average discount rate 4.68%   4.61%
Weighted average lease term 7 years   7 years
Right-of-use assets $ 658,806,000   $ 638,592,000
Right-of-use liabilities $ 98,776,000   $ 96,860,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accounts payable, accrued expenses and other liabilities (see Note 27)   Accounts payable, accrued expenses and other liabilities (see Note 27)
Right-of-use liabilities, non-current $ 652,285,000   $ 627,088,000
Rent expense 39,500,000 $ 36,700,000  
Management services, servicing fees and other      
Lessee, Lease, Description      
Operating lease, liability $ 198,500,000    
Minimum      
Lessee, Lease, Description      
Remaining lease terms 1 year    
Options to extend leases 1 year    
Maximum      
Lessee, Lease, Description      
Remaining lease terms 11 years    
Options to extend leases 10 years