Employee Benefit Plans - Reclassifications from Accumulated Other Comprehensive Income (Detail) $ in Thousands	3 Months Ended
Mar. 28, 2020 USD ($)
Retirement Benefits [Abstract]
Amortization of actuarial loss - total before tax	$ 249
Tax benefit	(59)
Net of tax	$ 190

Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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