Annual report pursuant to Section 13 and 15(d)

Management Agreement (Details)

v3.6.0.2
Management Agreement (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Corridor Infra Trust Management [Member]        
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 [Member] | Corridor Infra Trust Management [Member]        
Management Agreement [Line Items]        
Management Fee   $ 7,200 $ 5,700 $ 3,500
Administrative Fee   266 224 $ 134
New Management Agreement [Member]        
Management Agreement [Line Items]        
Incentive fees waived     133  
Incentive Fee $ 54 34 279  
Payments for other fees $ 149 $ 148 $ 145  
Administrative Agreement [Member]        
Management Agreement [Line Items]        
Annual rate percentage of managed assets   0.04%    
Minimum annual fee   $ 30