XML 94 R74.htm IDEA: XBRL DOCUMENT v3.10.0.1
Preferred Stock - Additional Information (Details)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Tranche
$ / shares
shares
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
shares
Class Of Stock [Line Items]          
Number of tranches sold to investors | Tranche     2    
Preferred Series A dividends payable | $ $ 22.9   $ 22.9   $ 22.9
Preferred stock dividend paid | $ 22.9   $ 45.8    
Preferred stock dividend per share | $ / shares     $ 23.75    
Accrued preferred dividends payable date     Aug. 14, 2018    
Deemed dividends on Series A Preferred Stock | $ $ 7.2 $ 6.3 $ 14.1 $ 12.5  
Series A Preferred Stock [Member]          
Class Of Stock [Line Items]          
Preferred Stock, Shares Issued 965,100   965,100   965,100
Private Placement [Member] | Series A Warrants [Member]          
Class Of Stock [Line Items]          
Warrants exercisable 13,550,004   13,550,004    
Private Placement [Member] | Series B Warrants [Member]          
Class Of Stock [Line Items]          
Warrants exercisable 6,533,727   6,533,727    
Private Placement [Member] | Series A Preferred Stock [Member]          
Class Of Stock [Line Items]          
Preferred Stock, Shares Issued 965,100   965,100