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Redeemable Preferred Stock - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Oct. 21, 2019
Nov. 29, 2018
Mar. 31, 2020
Mar. 31, 2019
Temporary Equity [Line Items]        
Shares issued     0 2,000,000
Preferred stock dividend rate 14.00%      
Initial excise price per share $ 0.01      
Redeemable preferred stock accreted value 3.00%      
Dividends, paid-in-kind 15.00%      
Adjusted percentage of outstanding common stock 1.50%      
Redeemable Preferred Stock [Member]        
Temporary Equity [Line Items]        
Redeemable preferred stock     $ 294.0  
Adjusted accretion and PIK on redeemable preferred stock     $ 48.0  
Private Placement [Member] | Redeemable Preferred Stock [Member]        
Temporary Equity [Line Items]        
Shares issued   300,000    
Preferred stock dividend rate   12.00%    
Preferred stock par value   $ 1.00    
Private Placement [Member] | Series A Warrants [Member]        
Temporary Equity [Line Items]        
Warrants to purchase common shares   6,800,000    
Initial excise price per share   $ 0.01    
Proceeds from issuance of warrants, net of discount   $ 289.5    
Payment of directly related issuance costs   $ 18.0