Income Taxes (Tables) (USD $)
In Thousands, unless otherwise specified

3 Months Ended

6 Months Ended

Jun. 28, 2014

Jun. 28, 2014

Income Tax Disclosures [Line Items]

Unrecognized Tax Benefits, Period Increase (Decrease)

$ 18,850

Reconciliation of Provision for Income Taxes on Condensed Consolidated Statements of Operations

The following table provides a reconciliation of the provision for income taxes on the condensed consolidated statements of income:

	Three Months Ended				Six Months Ended
	June 28, 2014		June 29, 2013		June 28, 2014		June 29, 2013
Income from continuing operations before income taxes	50,541		36,847		93,527		72,495
Effective tax rate	27.9	%	22.3	%	26.1	%	24.7	%
Provision for income taxes	14,081		8,219		24,439		17,941

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The income tax expense (benefit) related to items of other comprehensive income are as follows:

	Three Months Ended					Six Months Ended
	June 28, 2014		June 29, 2013			June 28, 2014			June 29, 2013
Income tax expense (benefit) related to foreign currency translation adjustment	$	—	$	(5	)	$	(105	)	$	656
Income tax expense related to change in unrecognized pension gains, losses and prior service costs	129		301			253			544
Income tax expense related to items of other comprehensive income	$	129	$	296		$	148		$	1,200

UNITED STATES

Income Tax Disclosures [Line Items]

Unrecognized Tax Benefits, Period Increase (Decrease)

$ (305)

$ (2,142)