XML 58 R44.htm IDEA: XBRL DOCUMENT v3.20.4
Debt - Principal Payments (Details) - USD ($)
Dec. 31, 2020
May 31, 2018
May 14, 2018
Jul. 31, 2017
Debt Instrument [Line Items]        
Total $ 317,066,000      
Less Than 1 Year 213,000      
1 - 3 Years 425,000      
3 - 5 Years 316,428,000      
More Than 5 Years 0      
2024 Convertible Notes        
Debt Instrument [Line Items]        
Total       $ 143,750,000
Stated interest rate       2.875%
2025 Convertible Notes        
Debt Instrument [Line Items]        
Total   $ 172,500,000    
Stated interest rate   2.375% 2.375%  
Senior Notes | 2024 Convertible Notes        
Debt Instrument [Line Items]        
Total 143,750,000      
Less Than 1 Year 0      
1 - 3 Years 0      
3 - 5 Years 143,750,000      
More Than 5 Years 0      
Senior Notes | 2025 Convertible Notes        
Debt Instrument [Line Items]        
Total 172,500,000      
Less Than 1 Year 0      
1 - 3 Years 0      
3 - 5 Years 172,500,000      
More Than 5 Years 0      
Unsecured Debt | 8.5% unsecured debt due 2024        
Debt Instrument [Line Items]        
Total 816,000      
Less Than 1 Year 213,000      
1 - 3 Years 425,000      
3 - 5 Years 178,000      
More Than 5 Years $ 0      
Stated interest rate 8.50%