Income Taxes - Net Deferred Tax Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 31, 2013
Deferred Income Taxes [Abstract]
Deferred tax assets – current	$ 9,890	$ 15,114
Deferred tax assets – non-current	9,156	1,751
Deferred tax liabilities – current	(51)	(9)
Deferred tax liabilities – non-current	(10,405)	(8,931)
Net deferred tax assets	8,590	7,925
Valuation allowance	$ 4,429	$ 2,723