Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Taxes [Line Items]
Deferred tax benefit and expense - discontinued operations		$ 1,342,000	$ (664,000)
Federal income tax rate	35.00%
Net unrecognized tax benefits	1,836,000	1,583,000
Accrued for estimated interest and penalties	744,000	628,000
Income taxes paid	$ 98,506,000	$ 64,255,000	$ 71,033,000