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 (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
Sep. 29, 2018
Dec. 30, 2017
6.375% Senior Notes [Member] | Estimated Fair Value [Member]    
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
Debt $ 296,175 $ 325,050
6.375% Senior Notes [Member] | Carrying Amount [Member]    
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
Debt 325,833 325,000
Junior Subordinated Debentures [Member] | Estimated Fair Value [Member]    
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
Debt 130,594 148,098
Junior Subordinated Debentures [Member] | Carrying Amount [Member]    
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]    
Debt $ 126,531 $ 127,475