Pension, Profit Sharing & Other Post-Retirement Benefits - Periodic Benefit Cost (Details) (Pension Plans, Defined Benefit [Member], USD $)	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 200,000	$ 100,000
Interest cost	1,900,000	1,700,000
Expected return on plan assets	(1,900,000)	(1,700,000)
Net amortization of actuarial loss	0	200,000
Net periodic benefit cost	$ 200,000	$ 300,000