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Long-Term Debt - Senior Secured Credit Facility - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 28, 2015
Jul. 31, 2015
Sep. 30, 2017
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Jun. 01, 2019
May 31, 2019
Nov. 30, 2018
May 31, 2018
Jan. 31, 2018
Jan. 04, 2018
Jun. 15, 2017
Debt Instrument [Line Items]                          
Senior Secured Credit Facility         $ 247,000,000 $ 183,000,000              
Leverage ratio     4.00%   1.00%                
Minimum                          
Debt Instrument [Line Items]                          
Debt instrument expanded borrowing base                 $ 190,000,000        
Maximum                          
Debt Instrument [Line Items]                          
Debt instrument expanded borrowing base                 $ 275,000,000 $ 190,000,000     $ 160,000,000
Senior Secured Credit Facility                          
Debt Instrument [Line Items]                          
Weighted average interest rate on borrowings         5.28%                
Current borrowing availability         $ 42,600,000             $ 160,000,000  
Senior secured credit facility sub limit       $ 2,500,000                  
Debt instrument expanded borrowing base       $ 290,000,000                  
Senior Secured Credit Facility | Minimum                          
Debt Instrument [Line Items]                          
Commitment fee percentage       0.375%                  
Debt instrument expanded borrowing base               $ 275,000,000          
Senior Secured Credit Facility | Minimum | Adjusted LIBOR Rate                          
Debt Instrument [Line Items]                          
Debt instrument basis spread on variable rate   2.00%                      
Senior Secured Credit Facility | Minimum | ABR                          
Debt Instrument [Line Items]                          
Debt instrument basis spread on variable rate   1.00%                      
Senior Secured Credit Facility | Maximum                          
Debt Instrument [Line Items]                          
Commitment fee percentage       0.50%                  
Debt instrument expanded borrowing base             $ 290,000,000            
Senior Secured Credit Facility | Maximum | Adjusted LIBOR Rate                          
Debt Instrument [Line Items]                          
Debt instrument basis spread on variable rate   3.00%                      
Senior Secured Credit Facility | Maximum | ABR                          
Debt Instrument [Line Items]                          
Debt instrument basis spread on variable rate   2.00%                      
11.25% Senior Notes                          
Debt Instrument [Line Items]                          
Debt instrument face amount                     $ 250,000,000    
Debt instrument interest rate (as a percent)         11.25%           11.25%    
LRAI | Senior Secured Credit Facility                          
Debt Instrument [Line Items]                          
Lien percentage of assets for senior secured credit facility           90.00%              
LRAI | Senior Secured Credit Facility | Federal Funds Effective Rate                          
Debt Instrument [Line Items]                          
Debt instrument basis spread on variable rate 0.50%                        
LRAI | Senior Secured Credit Facility | Adjusted LIBOR Rate                          
Debt Instrument [Line Items]                          
Debt instrument basis spread on variable rate 1.00%                        
LRAI | Senior Secured Credit Facility | Minimum                          
Debt Instrument [Line Items]                          
Lien percentage of assets for senior secured credit facility           80.00%              
LRAI | Citibank N A | Senior Secured Credit Facility                          
Debt Instrument [Line Items]                          
Debt instrument face amount   $ 500,000,000                      
Letter of Credit | Senior Secured Credit Facility                          
Debt Instrument [Line Items]                          
Current borrowing availability         $ 400,000