v3.26.1
Long-Term Debt, net - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 01, 2025
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Oct. 16, 2025
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May 31, 2026
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installment
tranche
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Feb. 28, 2025
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installment
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Mar. 31, 2024
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item
installment
Dec. 31, 2022
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item
installment
Jun. 30, 2022
USD ($)
item
installment
Jun. 30, 2026
USD ($)
item
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
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Jun. 30, 2025
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Dec. 31, 2025
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Jun. 02, 2026
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Mar. 02, 2026
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Feb. 11, 2021
USD ($)
Long-Term Debt, net                              
Number of vessels under construction | item               29   29          
Proceeds from long-term debt, net                   $ 658,000,000 $ 44,000,000        
Deferred finance costs, Long-term portion               $ 19,016,000   19,016,000   $ 17,032,000      
Long-term debt                           $ 262,800,000  
Payments of long-term debt                   603,057,000 18,220,000        
Deferred financing costs - Written off                   6,000,000 0        
Total long-term debt net of current portion and long term portion of deferred finance costs               $ 1,184,091,000   $ 1,184,091,000   872,076,000      
TEU | item               477,491   477,491          
Loss on debt extinguishment               $ (1,405,000) $ 0 $ (6,027,000) $ 0        
Prior to October 15, 2028, Subject Certain Condition                              
Long-Term Debt, net                              
Percentage of redemption price   106.875%                          
Citibank $382.5 mil. Revolving Credit Facility                              
Long-Term Debt, net                              
Credit facility           $ 382,500,000   382,500,000   382,500,000   382,500,000      
Amount drawn               $ 0   $ 0          
Term of debt           5 years                  
Number of quarterly instalments | installment           20                  
Amount of quarterly instalments           $ 11,250,000                  
Balloon payment at maturity           $ 157,500,000                  
Number of vessels pledged as collateral | item           12                  
Minimum percentage of fair market value of collateral vessels required to cover loan value               120.00%   120.00%          
Remaining borrowing availability               $ 225,000,000   $ 225,000,000          
Syndicated 850.0 million facility                              
Long-Term Debt, net                              
Credit facility       $ 850,000,000       850,000,000   850,000,000   850,000,000      
Amount drawn               0   0          
Number of quarterly instalments | installment       20                      
Amount of quarterly instalments       $ 800,000                      
Number of vessels under construction | item       14                      
Remaining borrowing availability               850,000,000   $ 850,000,000          
Syndicated 850.0 million facility | Minimum                              
Long-Term Debt, net                              
Balloon payment at maturity       $ 42,400,000                      
Syndicated 850.0 million facility | Maximum                              
Long-Term Debt, net                              
Balloon payment at maturity       $ 46,700,000                      
JOLCO Facilities                              
Long-Term Debt, net                              
Term of debt                   8 years          
Proceeds from long-term debt, net                   $ 738,000,000          
Amount of borrowing capacity               236,000,000   236,000,000          
Long-term debt               732,725,000   $ 732,725,000   79,806,000      
Number of additional financing facilities | item                   3          
Remaining borrowing availability               236,000,000   $ 236,000,000          
JOLCO Facilities | Minimum                              
Long-Term Debt, net                              
Maximum facility amount               68,000,000   68,000,000          
JOLCO Facilities | Maximum                              
Long-Term Debt, net                              
Maximum facility amount               103,500,000   103,500,000          
KfW $132.0 mil. Facility                              
Long-Term Debt, net                              
Credit facility     $ 132,000,000         132,000,000   132,000,000   132,000,000      
Number of quarterly instalments | tranche     40                        
Amount of quarterly instalments     $ 300,000                        
Balloon payment at maturity     $ 10,300,000                        
Number of vessels under construction | item     6                        
Proceeds from long-term debt, net                   0          
TEU | item     1,800                        
Tranches drawdown               22,000,000   22,000,000          
Quarterly instalments | installment     39                        
Remaining borrowing availability               132   132          
Syndicated $450.0 mil. Facility                              
Long-Term Debt, net                              
Credit facility         $ 450,000,000     450,000,000   450,000,000   450,000,000 $ 450,000,000    
Number of quarterly instalments | installment         20                    
Number of vessels pledged as collateral | item         8                    
Long-term debt               0   0   $ 335,210,000      
Payments of long-term debt         $ 42,780,000                    
Deferred financing costs - Written off                   3,800,000          
Syndicated $450.0 mil. Facility | Minimum                              
Long-Term Debt, net                              
Amount of quarterly instalments         600,000                    
Balloon payment at maturity         31,800,000                    
Syndicated $450.0 mil. Facility | Maximum                              
Long-Term Debt, net                              
Amount of quarterly instalments         900,000                    
Balloon payment at maturity         $ 45,500,000                    
BNP Paribas/Credit Agricole $130 mil. Facility                              
Long-Term Debt, net                              
Credit facility $ 130,000,000                            
Term of debt             5 years                
Balloon payment at maturity             $ 67,200,000                
Number of vessels pledged as collateral | item             6                
Face amount of debt             $ 130,000,000                
Payments of long-term debt 78,600,000                            
Total long-term debt net of current portion and long term portion of deferred finance costs 0                            
BNP Paribas/Credit Agricole $130 mil. Facility | Eight Quarterly Installment                              
Long-Term Debt, net                              
Number of quarterly instalments | installment             8                
Amount of quarterly instalments             $ 5,000,000                
BNP Paribas/Credit Agricole $130 mil. Facility | Twelve Quarterly Installments                              
Long-Term Debt, net                              
Number of quarterly instalments | installment             12                
Amount of quarterly instalments             $ 1,900,000                
BNP Paribas/Credit Agricole $130 mil. Facility | TEU sister vessels                              
Long-Term Debt, net                              
TEU | item             5,466                
Citibank/Natwest $815 mil. Facility                              
Long-Term Debt, net                              
Credit facility debt extinguished           $ 437,750,000                  
Credit facility           815,000,000                  
Alpha Bank $55.25 mil. Facility                              
Long-Term Debt, net                              
Credit facility 55,250,000         $ 55,250,000                  
Term of debt           5 years                  
Number of quarterly instalments | installment           20                  
Amount of quarterly instalments           $ 1,875,000                  
Balloon payment at maturity           $ 17,750,000                  
Number of vessels pledged as collateral | item           2                  
Prepayment of credit facility 32,800,000                            
Total long-term debt net of current portion and long term portion of deferred finance costs $ 0                            
Number of vessels excluding sale and lease back arrangement | item                       20      
Carrying value of vessels subject to first preferred mortgages as collateral to credit facilities               1,393,600,000   1,393,600,000          
Senior unsecured notes                              
Long-Term Debt, net                              
Long-term debt               $ 500,000,000   $ 500,000,000   $ 762,766,000      
Weighted-average interest rate on long-term borrowings                   6.22% 7.02%        
Senior Unsecured Notes Due 2028                              
Long-Term Debt, net                              
Face amount of debt                             $ 300,000,000
Deferred financing costs - Written off                   $ 2,200,000          
Fixed interest rate (as a percent)               8.50%   8.50%         8.50%
Amount repurchased                             $ 37,200,000
Senior unsecured notes, due 2032                              
Long-Term Debt, net                              
Proceeds from long-term debt, net   $ 496,700,000                          
Face amount of debt   $ 500,000,000                          
Percentage of par value issue price   99.335%                          
Fixed interest rate (as a percent)   6.875%                          
Bond issuance costs   $ 12,800,000                          
Senior unsecured notes, due 2032 | Prior To October 15, 2028                              
Long-Term Debt, net                              
Percentage of redemption senior note   100.00%                          
Senior unsecured notes, due 2032 | October 15, 2028, to Prior to October 15, 2029                              
Long-Term Debt, net                              
Percentage of redemption senior note   103.438%                          
Senior unsecured notes, due 2032 | October 15, 2029, to Prior to October 15, 2030                              
Long-Term Debt, net                              
Percentage of redemption senior note   101.719%                          
Senior unsecured notes, due 2032 | October 15, 2030, to maturity                              
Long-Term Debt, net                              
Percentage of redemption senior note   100.00%                          
Senior unsecured notes, due 2032 | Minimum | Prior to October 15, 2028, Subject Certain Condition                              
Long-Term Debt, net                              
Percentage of redemption senior note   60.00%                          
Senior unsecured notes, due 2032 | Maximum | Prior to October 15, 2028, Subject Certain Condition                              
Long-Term Debt, net                              
Percentage of redemption senior note   40.00%                          
Citibank $382.5 Mil. Revolving Credit Facility, Syndicated $450.0 Mil Facility And JOLCO Phoebe Facility                              
Long-Term Debt, net                              
Minimum liquidity               $ 30,000,000   $ 30,000,000          
Maximum leverage ratio               6.5   6.5          
Minimum interest coverage ratio               2.5   2.5