Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.19.1
Related Party Transactions - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Dec. 13, 2013
Jan. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2015
Jan. 22, 2014
Jul. 30, 2013
Related Party Transaction [Line Items]              
Related party transaction, expense     $ 0        
7.50% Notes              
Related Party Transaction [Line Items]              
Debt instrument fixed interest rate     7.50%       7.50%
6.75% Notes              
Related Party Transaction [Line Items]              
Debt instrument fixed interest rate     6.75%     6.75%  
Board of Directors Chairman | Robert L. Parker Jr.              
Related Party Transaction [Line Items]              
Consultant fee       $ 300,000      
Board of directors, service term 3 years            
Employee One              
Related Party Transaction [Line Items]              
Related party transaction, expense   $ 100,000          
Employee Two              
Related Party Transaction [Line Items]              
Related party transaction, expense   $ 100,000          
Director | 7.50% Notes              
Related Party Transaction [Line Items]              
Notes payable, related parties         $ 600,000    
Director | 6.75% Notes              
Related Party Transaction [Line Items]              
Notes payable, related parties         $ 700,000