Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT - Narrative (Details)

v3.20.1
LONG-TERM DEBT - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 07, 2012
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2018
Mar. 07, 2018
Mar. 06, 2018
7.750% Senior Notes | Senior Unsecured Notes Due December 15, 2022            
Debt Instrument [Line Items]            
Aggregate principal amount $ 200,000,000.0          
Stated interest rate 7.75%          
Proceeds from issuance of long-term debt $ 191,900,000          
Promissory notes            
Debt Instrument [Line Items]            
Payments on long-term debt   $ 400,000 $ 400,000      
Monthly payment   100,000        
Final payment   16,800,000        
Letter of Credit            
Debt Instrument [Line Items]            
Maximum borrowing amount   50,000,000.0        
Senior secured revolving credit facility            
Debt Instrument [Line Items]            
Maximum borrowing amount   125,000,000.0     $ 125,000,000.0 $ 200,000,000.0
Interest coverage ratio         175.00%  
Senior secured leverage ratio         325.00%  
Increase in commitments due to accordion feature   $ 50,000,000.0        
Commitment fee basis point   0.375%        
Outstanding borrowings   $ 0        
Letters of credit outstanding   $ 700,000        
Write off of deferred debt issuance cost       $ 400,000    
Payments of debt issuance costs       $ 1,300,000    
Senior secured revolving credit facility | Minimum            
Debt Instrument [Line Items]            
Commitment fee basis point   0.375%        
Senior secured revolving credit facility | Maximum            
Debt Instrument [Line Items]            
Commitment fee basis point   0.50%        
Senior secured revolving credit facility | Base Rate            
Debt Instrument [Line Items]            
Basis spread on variable rate   1.50%        
Senior secured revolving credit facility | Base Rate | Minimum            
Debt Instrument [Line Items]            
Basis spread on variable rate   1.25%        
Senior secured revolving credit facility | Base Rate | Maximum            
Debt Instrument [Line Items]            
Basis spread on variable rate   2.50%        
Senior secured revolving credit facility | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Basis spread on variable rate   2.50%        
Senior secured revolving credit facility | London Interbank Offered Rate (LIBOR) | Minimum            
Debt Instrument [Line Items]            
Basis spread on variable rate   2.25%        
Senior secured revolving credit facility | London Interbank Offered Rate (LIBOR) | Maximum            
Debt Instrument [Line Items]            
Basis spread on variable rate   3.50%