Defined Pension Benefit Plans (Components Of Net Pension Benefit Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Service cost-benefits earned	$ 0	$ 52
Interest cost on benefits obligation	491	513
Estimated return on assets	(591)	(531)
Prior service cost amortization	0	0
Loss amortization	189	158
Net periodic cost of defined benefit plans	$ 89	$ 192