Common Shares and Net (Loss) Income per Common Share - Additional Information (Detail) - USD ($)		12 Months Ended
	May 01, 2018	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Dec. 11, 2018
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net proceeds from offering of common stock		$ 6,400,000	$ 3,500,000	$ 366,800,000
Stock Repurchased and Retired During Period, Value		$ 74,900,000	$ 3,800,000	$ 5,700,000
Initial Repurchase Plan
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock Repurchase Program, Authorized Amount	$ 50,000,000.0
Stock Repurchase Program, Period in Force	12 months
Stock Repurchased and Retired During Period, Shares		2,973,282
Stock Repurchased and Retired During Period, Value		$ 46,000,000
New Repurchase Plan
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Stock Repurchase Program, Authorized Amount					$ 50,000,000.0
Stock Repurchased and Retired During Period, Shares		1,590,088
Stock Repurchased and Retired During Period, Value		$ 22,200,000