Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Income Tax Disclosure [Abstract]
Income tax (benefit)/expense	$ (10,247,000)	$ 2,578,000	$ (12,226,000)	$ 21,473,000
Pre-tax income (loss)	(22,687,000)	(2,722,000)	(12,759,000)	39,643,000
Remeasurement of deferred tax assets		1,500,000
Unrecognized tax benefits that would impact the effective tax rate	$ 15,000,000		$ 15,000,000