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Debt - Convertible Bond Debt (Details)
3 Months Ended
Sep. 15, 2020
Jul. 29, 2019
USD ($)
vessel
Mar. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]            
Number of vessels acquired | vessel   6        
Stockholders' equity attributable to parent     $ 811,709,000 $ 819,181,000 $ 693,769,000 $ 671,266,000
Debt Discounts and Debt Issuance Costs     (6,870,000) (7,387,000)    
Accumulated Deficit            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent     (168,373,000) (163,556,000) (278,858,000) (313,495,000)
Additional Paid-in Capital            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent     966,261,000 966,058,000 $ 961,930,000 982,746,000
Cumulative effect of adoption of ASU 2020-06            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent           (12,050,000)
Cumulative effect of adoption of ASU 2020-06 | Accumulated Deficit            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent           8,676,000
Cumulative effect of adoption of ASU 2020-06 | Additional Paid-in Capital            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent           (20,726,000)
Cumulative effect of adoption of ASU 2020-06 | Accounting Standards Update 2020-06 | Accumulated Deficit            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent           8,700,000
Cumulative effect of adoption of ASU 2020-06 | Accounting Standards Update 2020-06 | Additional Paid-in Capital            
Debt Instrument [Line Items]            
Stockholders' equity attributable to parent           20,700,000
Convertible Bond Debt            
Debt Instrument [Line Items]            
Net proceeds   $ 112,500,000        
Conversion premium per principal amount of notes   1,000 $ 1,000      
Reverse stock split ratio 0.1          
Convertible Bond Debt | Convertible Debt            
Debt Instrument [Line Items]            
Debt instrument, face amount   $ 114,100,000        
Range of interest rates   5.00%        
Debt issuance costs   $ 1,600,000        
Conversion premium (in shares) | shares     31.0670      
Conversion price (in dollars per share) | $ / shares     $ 32.19      
Debt Discounts and Debt Issuance Costs     $ (524,000) $ (620,000)    
Convertible Bond Debt | Convertible Debt | Accounting Standards Update 2020-06            
Debt Instrument [Line Items]            
Debt Discounts and Debt Issuance Costs           $ 12,000,000
Convertible Bond Debt | Convertible Debt | Debt Instrument, Redemption, Period Two            
Debt Instrument [Line Items]            
Redemption price percentage   100.00%        
Convertible Bond Debt | Convertible Debt | Other Liabilities            
Debt Instrument [Line Items]            
Debt issuance costs   $ 1,000,000        
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%