Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Details)

v3.19.2
Long-Term Debt - Additional Information (Details)
1 Months Ended 6 Months Ended
Apr. 30, 2019
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
May 03, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 29, 2017
USD ($)
Debt Disclosure [Line Items]            
Debt Issuance Costs, Line of Credit Arrangements, Gross       $ 2,500,000    
Current Ratio       1.00    
Second Lien Facility   $ 200,000,000     $ 200,000,000 $ 200,000,000
Proceeds from Debt, Net of Issuance Costs     $ 187,800,000      
Debt Instrument, Unamortized Discount   2,795,000     3,159,000 4,000,000.0
Unamortized Debt Issuance Expense   $ 5,729,000     6,466,000 $ 8,200,000
Debt Instrument, Discounted Percentage   98.00%        
Year 2 [Member]            
Debt Disclosure [Line Items]            
Prepayment Premium   102.00%        
Prepayment Premium, Change in Control   102.00%        
Year 3 [Member]            
Debt Disclosure [Line Items]            
Prepayment Premium   101.00%        
Prepayment Premium, Change in Control   101.00%        
Revolving Credit Facility            
Debt Disclosure [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity   $ 450,000,000   $ 1,000,000,000.0    
Line of Credit Facility, Current Borrowing Capacity       $ 500,000,000    
Interest Rate at Period End   4.42%        
Debt To E B I T D Ratio Maximum       4.00    
Line of Credit [Member]            
Debt Disclosure [Line Items]            
Letters of Credit Outstanding, Amount   $ 400,000     $ 400,000  
Line of Credit [Member] | Letter of Credit            
Debt Disclosure [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity       $ 25,000,000    
Second Lien Facility [Member]            
Debt Disclosure [Line Items]            
Interest rate option one, applicable margin rate over Adjusted LIBOR   7.00%        
Interest rate option two, applicable margin rate   6.00%        
Second Lien Facility, Initial Interest Rate   9.41% 8.34%      
Second Lien Facility, Effective Interest Rate   9.89%        
Debt Instrument, Term   5 years        
Minimum [Member] | Revolving Credit Facility            
Debt Disclosure [Line Items]            
Interest rate option one, applicable margin rate over Adjusted LIBOR 0.50% 2.00%        
Interest rate option two, applicable margin rate 1.50% 3.00%        
Minimum [Member] | Letter of Credit            
Debt Disclosure [Line Items]            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.375%        
Maximum [Member] | Revolving Credit Facility            
Debt Disclosure [Line Items]            
Interest rate option one, applicable margin rate over Adjusted LIBOR 1.50% 3.00%        
Interest rate option two, applicable margin rate 2.50% 4.00%        
Maximum [Member] | Letter of Credit            
Debt Disclosure [Line Items]            
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.50%        
Interest Payable One [Member] | Revolving Credit Facility            
Debt Disclosure [Line Items]            
Debt Instrument, Interest Payable Period   1 month        
Interest Payable Two [Member] | Revolving Credit Facility            
Debt Disclosure [Line Items]            
Debt Instrument, Interest Payable Period   3 months        
Interest Payable Three [Member] | Revolving Credit Facility            
Debt Disclosure [Line Items]            
Debt Instrument, Interest Payable Period   6 months