Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Fair Value of Company's Fixed Rate Senior Notes and Junior Subordinated Debentures (Detail)

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Fair Value Measurements - Fair Value of Company's Fixed Rate Senior Notes and Junior Subordinated Debentures (Detail) - USD ($)
$ in Thousands
Dec. 26, 2020
Dec. 28, 2019
Jun. 30, 2014
6.375% Senior Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Stated rate 6.375%    
6.375% Senior Notes | Carrying Amount      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt $ 328,333 $ 327,222  
6.375% Senior Notes | Estimated Fair Value      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt 327,525 305,250  
Junior Subordinated Debentures | Carrying Amount      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt 123,295 124,814  
Junior Subordinated Debentures | Estimated Fair Value      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt $ 128,022 $ 148,731 $ 131,141