Income Taxes - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 30, 2017 USD ($)	Dec. 30, 2017 USD ($) State	Dec. 31, 2016 USD ($)	Dec. 26, 2015 USD ($)
Income Taxes [Line Items]
Increase (decrease) in deferred tax assets		$ (4,700)
Increase (decrease) in deferred liabilities		(25,000)
Deferred income taxes	$ (22,442)	(22,442)	$ 8,243	$ 6,986
Interest and penalties included in provision for incomes taxes		0	0	$ 100
Accrued interest and penalties	0	0	300
Unrecognized tax benefits that would impact the effective tax rate if recognized	300	300	$ 500
Deferred tax assets capital loss carryforward	$ 1,700	$ 1,700
Deferred tax assets capital loss carryforward expiration year		2019
Valuation allowance release due to decrease in deferred tax asset, capital loss carryforward		$ 300
State and Local Jurisdiction
Income Taxes [Line Items]
Income tax return examination		In September 2017, the Internal Revenue Service ("IRS") commenced an examination of the Company's 2015 consolidated corporate income tax return. The examination was still in process as of December 30, 2017. As of December 30, 2017, the Company's 2014, and 2016 federal income tax returns remain subject to examination by IRS. The Company's state income tax returns remain subject to examination for three or four years depending on the state's statute of limitations.
Number of states being audited | State		1
State and Local Jurisdiction | Minimum
Income Taxes [Line Items]
Income tax return examination period		3 years
State and Local Jurisdiction | Maximum
Income Taxes [Line Items]
Income tax return examination period		4 years