Credit Facility and Long-Term Debt (Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 25, 2015	Sep. 26, 2014
Debt Disclosure [Abstract]
Contractual coupon interest	$ 9,928	$ 9,928	$ 29,482	$ 29,596
Amortization of debt issuance costs	456	456	1,367	1,367
Amortization of Debt Discount, Net	323	323	970	970
Total Interest Expense related to senior notes	$ 10,707	$ 10,707	$ 31,819	$ 31,933