Annual report pursuant to Section 13 and 15(d)

Management Agreement (Details)

v3.20.4
Management Agreement (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 15, 2019
Aug. 12, 2019
Jun. 29, 2015
Management Agreement [Line Items]                    
Percentage of directors to reach majority         0.6667%          
Number of days prior to written notice to terminate         30 days          
Percentage of fees of the last 4 quarters         300.00%          
Corridor Infra Trust Management                    
Management Agreement [Line Items]                    
Quarterly management fee percentage         0.25%          
Annual management fee percentage 1.00%       1.00%          
Quarterly incentive fee percentage in relation to distribution threshold 10.00%       10.00%          
Distribution threshold (in dollars per share) $ 0.625       $ 0.625          
Incentive fees waived $ 0 $ 0 $ 0 $ 171,000   $ 470,000        
Incentive Fee           658,000        
General and Administrative Expense | Corridor Infra Trust Management                    
Management Agreement [Line Items]                    
Management Fee         $ 5,100,000 6,800,000 $ 7,600,000      
Administrative Fee         $ 203,000 $ 264,000 $ 280,000      
Administrative Agreement                    
Management Agreement [Line Items]                    
Annual rate percentage of managed assets 0.04%       0.04%          
Minimum annual fee         $ 30,000          
5.875% Unsecured Convertible Senior Notes | Convertible Debt                    
Management Agreement [Line Items]                    
Effective interest rate 5.875%       5.875% 5.875%   5.875% 5.875%  
7.00% Unsecured convertible senior notes | Convertible Debt                    
Management Agreement [Line Items]                    
Effective interest rate 0.00%       0.00% 7.00%       7.00%