Employee Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Apr. 30, 2019	Dec. 29, 2018
Pension Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets at end of fiscal year		$ 3.3
Benefit obligation at end of fiscal year		$ 5.4
Union Number1199 Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated cost of termination of retirement pension plan	$ 1.7