Annual report pursuant to Section 13 and 15(d)

Management Agreement (Details)

v3.10.0.1
Management Agreement (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
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%    
Quarterly incentive fee percentage in relation to distribution threshold 10.00%    
Distribution threshold (in dollars per share) $ 0.625    
General and Administrative Expense | Corridor Infra Trust Management      
Management Agreement [Line Items]      
Management Fee $ 7,600 $ 7,200 $ 7,200
Administrative Fee $ 280 269 266
New Management Agreement      
Management Agreement [Line Items]      
Incentive fees waived   100 88
Incentive Fee   $ 595 $ 595
Administrative Agreement      
Management Agreement [Line Items]      
Annual rate percentage of managed assets 0.04%    
Minimum annual fee $ 30