Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 28, 2015	Sep. 26, 2015	Sep. 27, 2014	Dec. 27, 2014
Income Taxes [Line Items]
Unrecognized tax benefits		$ 400		$ 400
Accrued interest and penalties		300		$ 300
Income tax refund resulted from the Tax Increase Prevention Act, H.R. 5771	$ 17,200	$ 17,225	$ 0
State and Local Jurisdiction
Income Taxes [Line Items]
Income tax return examination		The Company's federal and state income tax returns remain subject to examination for three or four years depending on the state's statute of limitations.
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