Quarterly report pursuant to Section 13 or 15(d)

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

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Fair Value Measurements - Fair Value of Company's Fixed Rate Senior Notes and Junior Subordinated Debentures (Details) - USD ($)
$ in Thousands
Sep. 26, 2020
Dec. 28, 2019
6.375% Senior Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt instrument, stated rate 6.375%  
6.375% Senior Notes | Carrying Amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt $ 328,055 $ 327,222
6.375% Senior Notes | Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt 314,325 305,250
Junior Subordinated Debentures | Carrying Amount    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt 123,688 124,814
Junior Subordinated Debentures | Estimated Fair Value    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt $ 121,821 $ 148,731