Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Other (Details)

v3.19.3.a.u2
Long-Term Debt - Other (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Senior Notes | Event of Default Scenario | Amended Credit Agreement    
Debt covenants    
Minimum percentage of principal of debt holders to declare debt immediately due and payable 25.00%  
Revolving Facility    
Long-Term Debt    
Revolving Facility $ 250,000 $ 250,000
Less: standby letters of credit (61,382) (59,288)
Availability under Revolving Facility 188,618 $ 190,712
Revolving Facility | Amended Credit Agreement    
Long-Term Debt    
Revolving Facility $ 250,000  
Debt Covenants Term Period One | Amended Credit Agreement    
Debt covenants    
Maximum Net Leverage Ratio 3.75  
Minimum FCCR 1.25  
Debt Covenants Term Period Two | Amended Credit Agreement    
Debt covenants    
Maximum Net Leverage Ratio 3.50  
Minimum FCCR 1.25  
Debt Covenants Term Period Three | Amended Credit Agreement    
Debt covenants    
Maximum Net Leverage Ratio 3.25  
Minimum FCCR 1.25