Debt (Details) (USD $) Share data in Millions, unless otherwise specified	6 Months Ended							3 Months Ended	6 Months Ended		6 Months Ended		0 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Dec. 27, 2013	Jun. 27, 2014 March 31, 2014 through December 31, 2014 [Member]	Jun. 27, 2014 March 31, 2015 through December 31, 2015 [Member]	Jun. 27, 2014 March 31, 2016 through December 31, 2016 [Member]	Jun. 27, 2014 March 31, 2017 through December 31, 2017 [Member]	Jun. 27, 2014 Term loans [Member]	Jun. 27, 2014 Term loans [Member]	Dec. 27, 2013 Term loans [Member]	Jun. 27, 2014 Term A Loan [Member]	Dec. 27, 2013 Term A Loan [Member]	Feb. 21, 2014 Term B Loan [Member]	Jun. 27, 2014 Term B Loan [Member]	Dec. 27, 2013 Term B Loan [Member]	Jun. 27, 2014 Senior Convertible Notes [Member]	Dec. 27, 2013 Senior Convertible Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross amount											$ 89,578,000	$ 83,155,000		$ 48,195,000	$ 31,082,000	$ 0	$ 22,315,000
Less: Term Loan discounts								(21,542,000)	(21,542,000)	(24,207,000)
Total debt, net of term loan discount	116,231,000		112,345,000
Less: current portion of long-term debt	0		(22,315,000)
Long-term debt, net of discount	116,231,000		90,030,000
Coupon rate on senior notes (in hundredths)											12.00%			10.00%
Term loans increased during period from PIK								6,900,000
Accrual related to interest in other long term liabilities								3,800,000	3,800,000
Common stock issued (in shares)											8.2
Maximum capital expenditures in 2014	12,000,000
Maximum capital expenditures in 2015, and each fiscal year thereafter	14,000,000
Secured leverage ratio requirements [Abstract]
Secured leverage ratio				11.00	9.50	8.00	5.00
Senior Convertible Notes [Abstract]
Maturity date									Nov. 20, 2017
Amount of debt exchanged for term loan, common stock and cash													20,700,000
Exchange transaction result in issuance of Term B Loan													14,900,000
Exchange transaction result in issuance of shares (in shares)													1.1
Cash in exchange of common stock													2,400,000
Debt issuance costs														1,500,000
Unamortized deferred loan costs recorded in other assets	11,500,000		9,300,000
Loss on Extinguishment of Debt [Abstract]
Extinguishment of debt	1,000,000
Write-off of debt issuance costs	200,000
Incurred lender fees	800,000	600,000
Outstanding amounts due on either Repurchase Date or maturity date																1,600,000
Term loan principal covenant modification fee	$ 1,800,000
Term loan principal covenant modification fee (in percentage)	1.50%