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Leases - Narrative (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
Jan. 31, 2022
extension_option
Dec. 31, 2021
USD ($)
Nov. 30, 2021
Lessee, Lease, Description [Line Items]        
Present value of lease liabilities $ 428,387   $ 472,275  
Variable lease cost 7,500      
Land and Building        
Lessee, Lease, Description [Line Items]        
Number of extension options | extension_option   2    
Additional lease term   5 years    
Present value of lease liabilities 100,300   127,000  
Ships | Silver Dawn        
Lessee, Lease, Description [Line Items]        
Finance lease term       15 years
Present value of lease liabilities 279,000   283,700  
Ships | Silver Whisper        
Lessee, Lease, Description [Line Items]        
Present value of lease liabilities $ 16,600   $ 24,100  
Minimum | Real Estate        
Lessee, Lease, Description [Line Items]        
Renewal term 1 year      
Minimum | Berthing Agreement        
Lessee, Lease, Description [Line Items]        
Renewal term 1 year      
Maximum | Real Estate        
Lessee, Lease, Description [Line Items]        
Renewal term 10 years      
Maximum | Berthing Agreement        
Lessee, Lease, Description [Line Items]        
Renewal term 20 years