Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Details)

v3.19.3
Long-Term Debt - Additional Information (Details)
1 Months Ended 9 Months Ended
Apr. 30, 2019
Sep. 30, 2019
USD ($)
Sep. 30, 2017
USD ($)
May 03, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
Sep. 29, 2017
USD ($)
Debt Disclosure [Line Items]              
Debt Issuance Costs, Line of Credit Arrangements, Gross       $ 2,600,000      
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   2,608,000     3,159,000   4,000,000.0
Unamortized Debt Issuance Expense   $ 5,347,000     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       $ 1,000,000,000.0      
Line of Credit Facility, Current Borrowing Capacity       $ 500,000,000      
Interest Rate at Period End   4.07%          
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   9.05%       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%            
Interest rate option two, applicable margin rate 1.50%            
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%            
Interest rate option two, applicable margin rate 2.50%            
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