Equity-Based Compensation - Summary of Equity-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense before income taxes	$ 2,342	$ 1,199	$ 4,774	$ 4,194
Income tax benefit	(885)	(480)	(1,804)	(1,678)
Net equity-based compensation expense	1,457	719	2,970	2,516
Cost of Sales, Buying and Occupancy [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense before income taxes	187	152	418	546
Direct Store Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense before income taxes	294	215	762	580
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense before income taxes	$ 1,861	$ 832	$ 3,594	$ 3,068