Annual report pursuant to Section 13 and 15(d)

Stockholder's Equity - Preferred Stock (Details)

v3.8.0.1
Stockholder's Equity - Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 10, 2017
Apr. 18, 2017
Jan. 27, 2015
Dec. 31, 2017
Dec. 31, 2016
Class of Stock [Line Items]          
Preferred stock, authorized (in shares)       10,000,000  
Preferred stock, par value (in dollars per share)       $ 0.001  
Net offering proceeds     $ 54.2    
Series A Cumulative Redeemable Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock, authorized (in shares)       10,000,000 10,000,000
Preferred stock, par value (in dollars per share)       $ 0.001 $ 0.001
Preferred stock interest rate       7.375%  
Preferred stock, issued (in shares)     22,500 52,000 22,500
Preferred Stock, Liquidation Preference (in dollars per share)       $ 2,500 $ 2,500
Depositary Shares [Member]          
Class of Stock [Line Items]          
Percent equivalent of preferred shares       1.00%  
Dividends (in dollars per share)       $ 1.84375  
Preferred Stock, Liquidation Preference (in dollars per share)       $ 25.00  
Preferred Stock [Member] | Series A Cumulative Redeemable Preferred Stock [Member]          
Class of Stock [Line Items]          
Preferred stock interest rate     7.375% 7.375%  
Underwritten Public Offering [Member] | Depositary Shares [Member]          
Class of Stock [Line Items]          
Shares sold in offering (in shares) 150,000 2,800,000 2,250,000    
Sale of stock (in dollars per share) $ 25.00 $ 25.00      
Proceeds from sale of stock       $ 71.2  
Shares outstanding       5,200,000  
Underwritten Public Offering [Member] | Preferred Stock [Member]          
Class of Stock [Line Items]          
Shares outstanding       52,000  
Line of Credit [Member] | Revolving Credit Facility [Member] | CorEnergy Revolver [Member]          
Class of Stock [Line Items]          
Extinguishment of debt       $ 44.0  
CORRPrA [Member]          
Class of Stock [Line Items]          
Preferred stock, par value (in dollars per share)       $ 52.00