Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Income taxes computed at U.S. statutory rate	$ 10,197	$ 1,949	$ (4,067)
State income taxes	223	28	(109)
Foreign tax rate differential	3,502	342	777
Change in valuation allowance	(25,738)	1,648	23,894
Non-deductible Equity Compensation	380	311	242
Tax credits	(3,191)	(1,834)	(2,187)
Domestic production activities deduction	(354)
Liabilities for uncertain tax positions	67	74	118
Other, net	14	145	829
Provision (benefit) for income taxes	$ (14,900)	$ 2,663	$ 19,497