Employee Benefit Plans (Components of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2013	Dec. 26, 2012	Dec. 28, 2011
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost	$ 700	$ 1,500	$ 700
Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost	400	380	335
Interest cost	2,977	3,200	3,364
Expected return on plan assets	(4,488)	(4,057)	(4,182)
Amortization of net loss	1,653	1,763	1,004
Net periodic benefit cost	542	1,286	521
Other comprehensive (income) loss	(10,364)	202	8,997
Other Defined Benefit Plans [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0
Interest cost	111	116	127
Amortization of net loss	71	52	32
Net periodic benefit cost	182	168	159
Other comprehensive (income) loss	$ (109)	$ 175	$ 232