Summary of Significant Accounting Policies - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair value, measurements, recurring - USD ($) $ in Thousands	Jun. 29, 2019	Dec. 29, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets	$ 11,661	$ 9,906
Liabilities	10,777	9,759
Company-owned life insurance
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets	11,661	9,906
Deferred compensation liabilities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities	10,777	9,759
Significant other observable inputs (Level 2)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets	11,661	9,906
Liabilities	10,777	9,759
Significant other observable inputs (Level 2) | Company-owned life insurance
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets	11,661	9,906
Significant other observable inputs (Level 2) | Deferred compensation liabilities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities	$ 10,777	$ 9,759