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Fair Value Measurements - Schedule of Book Value and Estimated Fair Value of Debt Instruments, Excluding Debt Financing Costs (Detail) - USD ($)
$ in Thousands
Apr. 18, 2020
Dec. 28, 2019
Book value of debt instruments, excluding debt financing costs:    
Current maturities of long-term debt and finance lease liabilities $ 6,157 $ 6,349
Long-term debt and finance lease liabilities 596,100 687,659
Total book value of debt instruments 602,257 694,008
Fair value of debt instruments, excluding debt financing costs 606,561 700,631
Excess of fair value over book value $ 4,304 $ 6,623