Income Taxes Income Tax Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 25, 2016	Dec. 31, 2015	Dec. 27, 2015	Dec. 31, 2014	Dec. 28, 2014
Income Tax Reconciliation [Line Items]
Income Taxes Paid, Net		$ 21,900,000		$ 12,600,000		$ 9,900,000
Liability for Uncertainty in Income Taxes, Noncurrent	$ 5,301,000		$ 4,510,000
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions		$ 3,872,000		$ 1,238,000		2,553,000
Statutory rate	(35.00%)			(35.00%)	(35.00%)
State tax provisions, net of federal income tax benefit	(6.30%)		3.80%		(0.50%)
Permanent differences	(0.80%)		(1.50%)		(5.30%)
Tax credits	0.60%		0.90%		2.80%
Foreign income taxes at rates other than the statutory rate	11.70%		2.30%		(0.50%)
Valuation allowance and other	5.10%		(5.60%)		(8.40%)
Changes in tax liabilities, net	0.50%		6.40%		4.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	$ (0.012)		$ (0.044)			$ 0.000
Other	1.00%		1.00%		(1.20%)
Effective income tax rate	(24.40%)		(32.10%)		(43.90%)