Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Key Terms of Credit Agreement (Details)

v3.19.2
Long-Term Debt - Key Terms of Credit Agreement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
May 01, 2018
Jun. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Mar. 28, 2018
May 05, 2017
Long-Term Debt            
Amount outstanding   $ 745,589 $ 745,589      
Term Loan Facility            
Long-Term Debt            
Amount outstanding   318,750 318,750 $ 327,500    
Senior Notes            
Long-Term Debt            
Amount outstanding   400,000 400,000 400,000    
Equipment Notes            
Long-Term Debt            
Amount outstanding   26,839 $ 26,839 24,455    
Equipment notes issued   $ 5,000   26,600    
Debt term     5 years      
Equipment Notes | Minimum            
Long-Term Debt            
Interest rate   3.90% 3.90%      
Equipment Notes | Maximum            
Long-Term Debt            
Interest rate   4.40% 4.40%      
Revolving Facility            
Long-Term Debt            
Availability   $ 250,000 $ 250,000 $ 250,000    
Amended Credit Agreement            
Long-Term Debt            
Maximum amount of senior notes that may be issued under the credit agreement         $ 500,000  
Additional term loan and/or revolver capacity available under incremental facility   200,000 $ 200,000      
Scheduled maturity date     May 05, 2022      
Amended Credit Agreement | Minimum            
Long-Term Debt            
Commitment fee (as a percent)     0.15%      
Amended Credit Agreement | Maximum            
Long-Term Debt            
Commitment fee (as a percent)     0.275%      
Amended Credit Agreement | Term Loan Facility            
Long-Term Debt            
Proceeds from delayed-draw term loan $ 100,000          
Availability   250,000 $ 250,000      
Additional delayed draw term loan   100,000 100,000   $ 100,000  
Maximum borrowing capacity including delayed draw feature   $ 350,000 $ 350,000      
Amount outstanding           $ 250,000
Amended Credit Agreement | Senior Notes            
Long-Term Debt            
Interest rate   5.625% 5.625%      
Amended Credit Agreement | Senior Notes | Change in Control Scenario            
Long-Term Debt            
Redemption price as a percentage of principal     101.00%      
Amended Credit Agreement | Revolving Facility            
Long-Term Debt            
Availability   $ 250,000 $ 250,000      
Sublimit for issuance of letters of credit under Revolving Facility*   100,000 100,000      
Sublimit for swingline loans under Revolving Facility*   $ 20,000 $ 20,000      
Interest rate   3.69% 3.69%      
Amended Credit Agreement | Base Rate Borrowings | Minimum            
Long-Term Debt            
Applicable margin based on total leverage ratio     0.00%      
Amended Credit Agreement | Base Rate Borrowings | Maximum            
Long-Term Debt            
Applicable margin based on total leverage ratio     1.50%      
Amended Credit Agreement | LIBOR Rate Borrowings | Minimum            
Long-Term Debt            
Applicable margin based on total leverage ratio     1.00%      
Amended Credit Agreement | LIBOR Rate Borrowings | Maximum            
Long-Term Debt            
Applicable margin based on total leverage ratio     2.50%      
Federal Funds Rate | Amended Credit Agreement | Base Rate Borrowings            
Long-Term Debt            
Basis spread     0.50%      
LIBOR | Amended Credit Agreement | Base Rate Borrowings            
Long-Term Debt            
Basis spread     1.00%      
Maturity of the reference rate     1 month