Employee Benefit Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2015	Dec. 31, 2014	Dec. 25, 2013
Components of net periodic benefit cost [Abstract]
Settlement loss recognized		$ (50)
Net periodic benefit cost	$ 1,800	700	$ 700
Pension Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost	380	380	400
Interest cost	2,983	3,099	2,977
Expected return on plan assets	(3,508)	(3,953)	(4,488)
Amortization of net loss	1,733	924	1,653
Net periodic benefit cost	1,588	450	542
Other comprehensive (income) loss	(3,619)	10,141	(10,364)
Other Defined Benefit Plans [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0
Interest cost	107	123	111
Amortization of net loss	79	66	71
Settlement loss recognized	0	50	0
Net periodic benefit cost	186	239	182
Other comprehensive (income) loss	$ (36)	$ 182	$ (109)