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Commitments and Contingencies (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Mar. 31, 2019
item
Dec. 31, 2022
USD ($)
item
Jul. 31, 2018
item
Sep. 30, 2017
item
Commitments and Contingencies        
Number of assumed off-hire days when each vessel will undergo scheduled dry-docking   30 days    
Future gross minimum lease payments receivable   $ 596,529    
Wartsila Greece | GasLog LNG Services        
Commitments and Contingencies        
Number of vessels under maintenance agreement | item     9 9
Samsung Heavy Industries Co., Ltd | GasLog LNG Services        
Commitments and Contingencies        
Number of vessels under maintenance agreement | item 11      
Period of services to be provided (in years) 6 years      
Number of vessels with ballast water management system installed | item   7    
Not later than one year        
Commitments and Contingencies        
Future gross minimum lease payments receivable   $ 278,115    
Later than one year and not later than two years        
Commitments and Contingencies        
Future gross minimum lease payments receivable   128,750    
Later than two years and not later than three years        
Commitments and Contingencies        
Future gross minimum lease payments receivable   87,467    
Later than three years and not later than four years        
Commitments and Contingencies        
Future gross minimum lease payments receivable   44,869    
Later than four years and not later than five years        
Commitments and Contingencies        
Future gross minimum lease payments receivable   25,487    
Later than five years        
Commitments and Contingencies        
Future gross minimum lease payments receivable   $ 31,841