Restructuring and Severance Costs (Detail) - USD ($) $ in Thousands			12 Months Ended
	May. 28, 2015	Dec. 03, 2013	Dec. 31, 2015
Chief Executive Officer [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 915
Chief Financial Officer [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 710
Payments and adjustments			$ 426
Restricted Stock [Member] | Chief Financial Officer [Member]
Restructuring Cost and Reserve [Line Items]
Pro-rata grant of restricted stock	$ 231
Employee Severance [Member] | Chief Financial Officer [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 941