Debt - Issuance of 7.00% Senior Secured Notes due 2019 (Details)			1 Months Ended	3 Months Ended		12 Months Ended
	Sep. 22, 2015 USD ($)	May 14, 2014 USD ($)	May 31, 2014 USD ($)	Dec. 31, 2017 USD ($)	Dec. 25, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 25, 2016 USD ($)	Dec. 27, 2015 USD ($)	Nov. 30, 2017 USD ($)	Sep. 12, 2017 USD ($)	Aug. 21, 2015 USD ($)
Debt Instrument [Line Items]
Principal				$ 300,800,000.0	$ 437,300,000.0	$ 300,800,000.0	$ 437,300,000.0
Proceeds from the issuance of long-term debt, net of issuance costs						300,000,000	0	$ 0
Original issue discount					2,400,000		2,400,000
Gain (loss) on extinguishment of debt						(17,300,000)	200,000	$ (3,400,000)
Revolving Credit Facility
Debt Instrument [Line Items]
Credit agreement borrowings			$ 41,000,000
Outstanding borrowings				$ 0		$ 0					$ 41,000,000
Maximum borrowing capacity		$ 110,000,000.0									$ 110,000,000.0
Senior notes | 7% Senior Notes due 2019
Debt Instrument [Line Items]
Stated interest rate			7.00%	7.00%		7.00%
Principal			$ 625,000,000.0	$ 300,000,000		$ 300,000,000
Proceeds from the issuance of long-term debt, net of issuance costs		618,500,000
Original issue discount	$ 1,400,000	6,500,000		1,600,000	100,000	1,600,000	100,000
Debt issuance costs		$ 8,800,000
Reacquisition price	175,000,000								$ 385,200,000	$ 135,500,000
Write off of unamortized issue costs	1,800,000				100,000	2,300,000
Unamortized premium									$ 12,000,000
Gain (loss) on extinguishment of debt	(3,400,000)			$ (15,200,000)	200,000	$ (17,300,000)
Fixed charge coverage ratio			2.0
Legal fees	$ 200,000
Period following asset disposition						360 days
Debt repurchased and extinguished					14,500,000	$ 435,500,000	$ 14,500,000
Gain (loss) on extinguishment of debt before amortization of issuance cost and discount					$ 400,000	$ (13,400,000)
Senior notes | 10% Senior Notes due June 2017
Debt Instrument [Line Items]
Stated interest rate			10.00%
Principal			$ 625,000,000.0
Reacquisition price			661,500,000
Early termination fee			31,200,000
Write off of unamortized issue costs			15,500,000
Unamortized premium			12,900,000
Interest accrued in escrow			5,300,000
Gain (loss) on extinguishment of debt			$ (39,100,000)