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Debt - Convertible Bond Debt (Details)
May 25, 2022
$ / shares
shares
Mar. 25, 2022
USD ($)
$ / shares
Nov. 24, 2021
$ / shares
Jul. 29, 2019
USD ($)
vessel
Debt Instrument [Line Items]        
Number of vessels acquired | vessel       6
Convertible Senior Notes due 2024 | Convertible Debt        
Debt Instrument [Line Items]        
Debt instrument, face amount       $ 114,100,000
Interest Rate Swap detail       5.00%
Debt issuance costs       $ 1,600,000
Cash dividends per share (in dollars per share) | $ / shares $ 2.00 $ 2.05 $ 2.00  
Conversion premium (in shares) | shares 28.523      
Conversion price (in dollars per share) | $ / shares $ 35.06      
Convertible Senior Notes due 2024 | Convertible Debt | Debt Instrument, Redemption, Period Two        
Debt Instrument [Line Items]        
Redemption price percentage       100.00%
Convertible Senior Notes due 2024 | Convertible Debt | Other Liabilities        
Debt Instrument [Line Items]        
Debt issuance costs       $ 1,000,000
Convertible Bond Debt        
Debt Instrument [Line Items]        
Net proceeds       112,500,000
Conversion premium per principal amount of notes   $ 1,000   $ 1,000
Credit Default Option | Unsecured Debt        
Debt Instrument [Line Items]        
Amount of principal amount eligible for declaration in case of default       25.00%
Amount of notes to be due and payable       100.00%