Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Income (loss) from continuing operations before income taxes
Income from continuing operations, before income taxes	$ 42,986	$ 35,648
Effective tax rate (as a percentage)	24.10%	27.30%
Provision (benefit) for income taxes	10,358	9,722
Other Comprehensive Income (Loss), Tax [Abstract]
Income tax expense (beneffit) related to foreign currency translation adjustments	(105)	662
Income tax expense related to the change in unrecognized pension gains, losses and prior service costs	124	242
Income tax expense (benefit) related to items of other comprehensive income	19	904
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits, Period Increase (Decrease)	(2,563)
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	24
Interest related to unrecognized income tax benefits	667
Unrecognized tax benefits	15,912
Decrease in unrecognized tax benefits, that if recognized would impact the effective tax rate	2,719
Unrecognized tax benefits that would impact effective tax rate favorably, if recognized	14,293
UNITED STATES
Income Tax Uncertainties [Abstract]
Unrecognized Tax Benefits, Period Increase (Decrease)	1,837
CANADA
Income Tax Disclosures [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions	$ 238