Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015
Deferred tax assets
Accrued liabilities	$ 14,479	$ 19,277
Accrued bonuses	5,399	4,621
Other assets and liabilities	12,434	11,488
Equity awards	7,704	6,866
Other	3,716	3,662
Foreign net operating losses	3,418	4,769
Foreign tax credit carryforwards	2,347
Total deferred tax assets	49,497	50,683
Valuation allowance on foreign net operating and capital losses, foreign deferred tax assets, and foreign tax credit carryforwards	(5,462)	(2,866)
Total deferred tax assets	44,035	47,817
Deferred tax liabilities
Deferred expenses	(9,544)	(6,861)
Accelerated depreciation	(25,072)	(21,434)
Goodwill	(18,480)	(16,752)
Other	(217)	(4,965)
Total deferred tax liabilities	(53,313)	(50,012)
Net deferred liability	$ (9,278)	(2,195)
Other tax disclosures
Expiration term of foreign tax credit carryforwards	10 years
Valuation allowance	$ 5,462	2,866
Foreign tax authority
Other tax disclosures
Net operating loss carryovers	14,500	21,900
Valuation allowance related to net operating losses	3,100	$ 2,900
Foreign tax credit carryforwards
Deferred tax assets
Valuation allowance on foreign net operating and capital losses, foreign deferred tax assets, and foreign tax credit carryforwards	(2,300)
Other tax disclosures
Valuation allowance	$ 2,300