Debt (Details Textual) (USD $)	9 Months Ended
	Sep. 25, 2012	Dec. 27, 2011
Debt (Textual) [Abstract]
Borrowing outstanding		$ 0
Outstanding letters of credit	17,700,000
Maturity date of debt instruments senior notes	Dec. 28, 2018
Debt (Additional Textual) [Abstract]
Commitment fee percentage	0.50%
Term Loan borrowing, Description	The refinancing lowered the spread over LIBOR to 4.0% from 5.25% on the Term Loan borrowings, and lowered the Term Loan LIBOR floor to 1.25% from 1.5%. The combined weighted average interest rate was 5.25% per annum at September 25, 2012
Interest is paid at base rate	4.00%
Interest is paid at LIBOR Plus	5.25%
Combined weighted average rate	5.25%
Quarterly amortization of term loan	937,500
Amortizes rate of principal amount	1.00%
Senior note redemption, description	Effective January 15, 2016, these Notes may be redeemed at a redemption price of 105.250% plus accrued and unpaid interest until January 15, 2017, when the redemption price becomes 102.625% plus accrued and unpaid interest and remains such until January 15, 2018
Senior note redemption percentage one	105.25%
Senior note redemption percentage two	102.625%
Credit agreement period	95 days
Soft call premium	3,800,000
Transaction related expenses	1,100,000
Debt issuance cost	3,200,000
Debt extinguishment expense	1,700,000
Additional debt issuance cost	3,400,000
Maximum [Member]
Debt (Textual) [Abstract]
Interest is paid at LIBOR floor	1.50%
Excess cash flow	6,000,000
Minimum [Member]
Debt (Textual) [Abstract]
Interest is paid at LIBOR floor	1.25%
Excess cash flow	4,000,000
Senior Notes [Member]
Debt (Textual) [Abstract]
Interest on Senior Note	10.50%
Redemption price as a percentage of senior notes principal amounts	100.00%
Percentage of premium over the senior notes principal amount	1.00%
Maturity date of debt instruments senior notes	Jan. 15, 2016
Term Loan [Member]
Debt (Textual) [Abstract]
Borrowing capacity available under our revolving line of credit		375,000,000
Revolving Facility ($100 million) [Member]
Debt (Textual) [Abstract]
Borrowing capacity available under our revolving line of credit		100,000,000
Outstanding letters of credit	17,700,000
Old Revolving Credit Facility [Member]
Debt (Textual) [Abstract]
Borrowing capacity available under our revolving line of credit	82,300,000	57,300,000
Outstanding letters of credit		$ 17,700,000
LIBOR Loan [Member]
Debt (Textual) [Abstract]
Prevailing LIBOR loan rate	5.00%
Base rate loan [Member]
Debt (Textual) [Abstract]
Prevailing LIBOR loan rate	4.00%