XML 25 R57.htm IDEA: XBRL DOCUMENT v3.20.1
Debt - Unsecured Senior Notes - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Apr. 30, 2015
Dec. 31, 2019
Oct. 30, 2019
May 31, 2019
Dec. 31, 2018
Apr. 19, 2018
Apr. 01, 2016
Debt Instrument [Line Items]              
Debt financing costs   $ 300,000     $ 1,000,000    
Unsecured senior notes              
Debt Instrument [Line Items]              
Debt instrument, interest rate             6.50%
Consent fee   $ 300,000 $ 300,000   300,000 $ 300,000  
Unsecured senior notes | 5.50% Senior Notes              
Debt Instrument [Line Items]              
Debt instrument, face amount $ 55,000,000            
Debt instrument, interest rate 5.50% 8.50%          
Proceeds from issuance of long-term debt $ 53,500,000            
Debt financing costs $ 1,500,000            
Accrued unpaid interest   $ 700,000     $ 800,000    
Unsecured senior notes | 5.50% Senior Notes | Before May 1, 2016              
Debt Instrument [Line Items]              
Redemption price, percentage   101.00%          
Revolving Credit Facility and Senior Notes              
Debt Instrument [Line Items]              
Debt instrument, interest rate       7.50%