Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Taxes Paid	$ 25.00	$ 26.35	$ 27.50
Operating Loss Carryforwards	$ 95.5
Earliest Tax Year [Member]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2027
Pennsylvania [Member] | Earliest Tax Year [Member]
Open Tax Year	2011
Pennsylvania [Member] | Latest Tax Year [Member]
Open Tax Year	2014