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