Common Shares and Net Loss Per Common Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 09, 2016	Apr. 02, 2016	Apr. 04, 2015
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net proceeds from offering of common stock		$ 144.1
Net deferred tax benefit		$ (10.8)	$ (11.7)
2016 Offering [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Number of shares issued in offering	12,765,000
Public offering price per share	$ 11.80
Net proceeds from offering of common stock	$ 150.6
Underwriter commissions	6.0
Professional fees	0.8
Net deferred tax benefit	$ 1.7