Debt (Debt Covenant Compliance) (Details) (USD $) In Millions, unless otherwise specified		3 Months Ended	12 Months Ended	6 Months Ended	9 Months Ended						9 Months Ended
	Sep. 23, 2012	Mar. 25, 2012 Debt Covenant Compliance February 2012 [Member]	Dec. 25, 2011 Debt Covenant Compliance February 2012 [Member]	Jun. 24, 2012 Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Senior Secured Credit Facility [Member] Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Letter of Credit [Member]	Sep. 23, 2012 Series A Senior Secured Notes [Member] Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Series B Senior Secured Notes [Member] Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Series C Senior Secured Notes [Member] Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Maximum [Member]	Sep. 23, 2012 Maximum [Member] Senior Secured Notes [Member]	Sep. 23, 2012 Maximum [Member] Senior Secured Credit Facility [Member] Debt Covenant Compliance July 2012 [Member]	Sep. 23, 2012 Maximum [Member] Senior Secured Credit Facility [Member] Debt Covenant Compliance July 2012, Base Rate [Member]	Sep. 23, 2012 Maximum [Member] Senior Secured Credit Facility [Member] Debt Covenant Compliance July 2012, LIBOR Rate [Member]
Line of Credit Facility, Current Borrowing Capacity	$ 75.0				$ 68.9
Letters of Credit Outstanding, Amount							1.4
Leverage Ratio			2.75								2.75	2.75
Debt instrument, basis spread on variable rate						0.50%								4.25%	5.25%
Debt instrument, description of variable rate basis					a daily rate equal to the one-month LIBOR rate, plus 1.00%
Line of credit facility, unused capacity, commitment fee percentage													1.00%
Adjusted leverage ratio Q1 2012		3.00
Adjusted leverage ratio Q2 2012		3.35		5.25
Adjusted leverage ratio Q3 2012		3.25		6.50
Amended total commitment						75.0
Adjusted leverage ratio Q4 2012				5.50
Adjusted leverage ratio Q1 2013				3.50
Adjusted leverage ratio Q2 2013				2.75
Cash restructuring excluded from EBITDA calculation					25.0
Fixed charge covenant Q4 2012				1.00
Interest rate								5.75%	6.13%	6.50%
Cash balance threshold for repayment	$ 65