Employee Benefit Plans (Components of Net Periodic Benefit Cost (Credit)) (Details) (USD $)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Defined Benefit Pension Benefits [Member]
Components of net periodic benefit cost (credit)
Service cost	$ 1,030,000	$ 925,000
Interest cost	5,916,000	5,315,000
Expected return on plan assets	(6,263,000)	(6,264,000)
Amortization of prior service	(71,000)	(67,000)
Net periodic benefit cost (credit)	612,000	(91,000)
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	900,000
Postretirement Medical Benefits [Member]
Components of net periodic benefit cost (credit)
Service cost	24,000	28,000
Interest cost	39,000	36,000
Expected return on plan assets	(241,000)	(241,000)
Amortization of prior service	0	0
Net periodic benefit cost (credit)	$ (178,000)	$ (177,000)