Fair Value of Financial Instruments - Schedule of Fair Value Valuation of Financial Instruments (Parenthetical) (Details)				6 Months Ended	12 Months Ended
	Jun. 28, 2019	Jun. 24, 2019	Mar. 18, 2019	Jun. 30, 2019	Dec. 31, 2018
6.00% Senior Secured Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance senior notes, stated percentage				6.00%	6.00%
Debt instrument, maturity date				Apr. 15, 2023	Apr. 15, 2023
8.25% Senior Unsecured Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance senior notes, stated percentage				8.25%	8.25%
Debt instrument, maturity date				Oct. 15, 2023	Oct. 15, 2023
7.125% Senior Unsecured Notes
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance senior notes, stated percentage				7.125%	7.125%
Debt instrument, maturity date				Dec. 15, 2024	Dec. 15, 2024
Exchangeable Senior Notes - 4.00%, due June 15, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance senior notes, stated percentage	4.00%			4.00%	4.00%
Debt instrument, maturity date	Jun. 15, 2024			Jun. 15, 2024
Senior Secured Term Loan B Facility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt instrument, maturity date			Oct. 24, 2022	Oct. 24, 2022	Oct. 24, 2022
Senior Secured Revolving Credit Facility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt instrument, maturity date		Apr. 24, 2022		Apr. 24, 2022	Apr. 24, 2020