Income Taxes Components of Income Tax Expense (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 25, 2016	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2016	Dec. 25, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount									$ 300,000
Operating Loss Carryforwards									49,100,000
Federal									5,017,000		$ (10,900,000)	$ (2,976,000)
State									(450,000)		481,000	(453,000)
Foreign									10,639,000		(2,099,000)	(8,660,000)
Total current taxes									15,206,000		12,518,000	12,089,000
Federal									1,199,000		(961,000)	657,000
State									332,000		(576,000)	(109,000)
Foreign									(3,397,000)		2,716,000	4,642,000
Total deferred taxes									(1,866,000)		(1,179,000)	(5,190,000)
Income tax provision	$ 3,764,000	$ (1,064,000)	$ 6,082,000	$ 4,558,000	$ 5,232,000	$ (2,669,000)	$ (4,200,000)	$ (762,000)	$ 13,340,000	$ (13,340,000)	$ (11,339,000)	$ (6,899,000)