Common Shares and Net Income (Loss) per Common Share - Additional Information (Details) - USD ($)		3 Months Ended
	Dec. 14, 2018	Mar. 30, 2019	Mar. 31, 2018	Dec. 29, 2018	Dec. 11, 2018
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period		$ 11,000,000	$ 5,600,000
New Repurchase Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 50,000,000
Stock repurchase program, period in force	12 months
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				27,800,000
Stock repurchased during period (in shares)		570,000
Stock repurchased during period		$ 7,800,000