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Long-Term Debt, net - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended
May 12, 2022
USD ($)
Apr. 12, 2021
USD ($)
Feb. 11, 2021
USD ($)
Jun. 30, 2022
USD ($)
item
Jun. 30, 2022
USD ($)
item
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
item
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Line of Credit Facility [Line Items]                  
Deferred bond issuance costs       $ 23,400,000 $ 23,400,000   $ 23,400,000   $ 28,400,000
Remaining borrowing availability       0 0   $ 0    
Number of vessels excluding sale and lease back arrangement | item             54    
Carrying value of vessels       $ 1,852,200,000 1,852,200,000   $ 1,852,200,000    
Early repaid amount             383,125,000 $ 1,295,025,000  
Gain on debt extinguishment   $ 111,600,000     $ 22,939,000 $ 111,616,000 22,939,000 111,616,000  
Incurred interest expense             13,600,000    
Interest expense capitalized             700,000 $ 0  
Interest expense incurred             $ 14,300,000    
TEU sister vessels                  
Line of Credit Facility [Line Items]                  
TEU | item       5,466 5,466   5,466    
Citibank/Natwest $815 mil. Facility                  
Line of Credit Facility [Line Items]                  
Credit facility $ 815,000,000     $ 815,000,000 $ 815,000,000   $ 815,000,000    
Amount of quarterly instalment 12,900,000                
Balloon payment at maturity 309,000,000.0                
Long-term debt       $ 463,500,000 $ 463,500,000   $ 463,500,000   774,250,000
Minimum percentage of fair market value of collateral vessels required to cover loan value       120.00% 120.00%   120.00%    
Minimum liquidity       $ 30,000,000.0 $ 30,000,000.0   $ 30,000,000.0    
Maximum leverage ratio       6.5 6.5   6.5    
Minimum interest coverage ratio       2.5 2.5   2.5    
Early repaid amount 270,000,000.0                
Senior unsecured notes                  
Line of Credit Facility [Line Items]                  
Fixed interest rate (as a percent)     8.50%            
Percent of equity offering proceeds within 90 days after the equity offering closing     108.50%            
Deferred bond issuance costs     $ 9,000,000.0            
Long-term debt     $ 300,000,000.0 $ 300,000,000 $ 300,000,000   $ 300,000,000   300,000,000
Senior unsecured notes | March 1, 2024                  
Line of Credit Facility [Line Items]                  
Percent of principal amount being redeemed     104.25%            
Senior unsecured notes | March 1, 2025                  
Line of Credit Facility [Line Items]                  
Percent of principal amount being redeemed     102.125%            
Senior unsecured notes | March 1, 2026                  
Line of Credit Facility [Line Items]                  
Percent of principal amount being redeemed     100.00%            
Senior unsecured notes | Maximum                  
Line of Credit Facility [Line Items]                  
Redemption price (as percent)     35.00%            
Macquarie Bank $58 mil. Facility                  
Line of Credit Facility [Line Items]                  
Credit facility       58,000,000 58,000,000   58,000,000    
Long-term debt                 45,600,000
Early repaid amount 43,000,000.0                
Eurobank $30.0 mil. Facility                  
Line of Credit Facility [Line Items]                  
Credit facility       30,000,000.0 30,000,000.0   30,000,000.0    
Long-term debt                 21,375,000
Early repaid amount 20,600,000                
SinoPac $13.3 mil. Facility                  
Line of Credit Facility [Line Items]                  
Credit facility       13,300,000 13,300,000   13,300,000    
Long-term debt                 $ 10,800,000
Early repaid amount $ 9,800,000                
BNP Paribas/Credit Agricole $130 mil. Facility                  
Line of Credit Facility [Line Items]                  
Credit facility       130,000,000 130,000,000   130,000,000    
Amount of quarterly instalment       $ 5,000,000.0          
Spread on variable rate       2.16%          
Long-term debt       $ 130,000,000 $ 130,000,000   $ 130,000,000    
Minimum percentage of fair market value of collateral vessels required to cover loan value       125.00% 125.00%   125.00%    
Early repaid amount       $ 130,000,000.0          
BNP Paribas/Credit Agricole $130 mil. Facility | TEU sister vessels                  
Line of Credit Facility [Line Items]                  
Amount of quarterly instalment       1,900,000          
Balloon payment at maturity       $ 67,200,000 $ 67,200,000   $ 67,200,000