Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Apr. 03, 2016	Dec. 31, 2015
Deferred Income Taxes [Abstract]
Deferred tax assets – current	$ 0	$ 10,566
Deferred tax assets – non-current	12,885	6,719
Deferred tax liabilities – current	0	(441)
Deferred tax liabilities – non-current	(5,383)	(5,187)
Net deferred tax assets	7,502	11,657
Valuation allowance	$ 3,532	$ 3,562