Defined Benefit Plans (Details) (USD $)			3 Months Ended
	Mar. 26, 2014	Dec. 25, 2013	Mar. 26, 2014 Pension Plan [Member]	Mar. 27, 2013 Pension Plan [Member]	Mar. 26, 2014 Other Defined Benefit Plans [Member]	Mar. 27, 2013 Other Defined Benefit Plans [Member]
Components of net periodic benefit cost [Abstract]
Service cost			$ 95,000	$ 100,000
Interest cost			779,000	754,000	31,000	28,000
Expected return on plan assets			(989,000)	(1,124,000)
Amortization of net loss			231,000	419,000	15,000	18,000
Net periodic benefit cost			116,000	149,000	46,000	46,000
Maximum contributions made to qualified pension plan and other defined benefit plans			1,300,000	1,400,000	100,000	100,000
Maximum expected additional contributions to be made to qualified pension plan and other defined benefit plans			1,300,000		100,000
Additional minimum pension liability	$ 18,500,000	$ 18,700,000