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Net Income per Share - Computation of Net Income Per Share, Basic (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 28, 2024
Jun. 29, 2024
Mar. 30, 2024
Sep. 30, 2023
Jul. 01, 2023
Apr. 01, 2023
Sep. 28, 2024
Sep. 30, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Net Income (Loss) $ 33,514 $ 52,339 $ 12,597 $ 45,295 $ 58,035 $ (8,956) $ 98,450 $ 94,374
Allocation of net income for basic:                
Allocation of net income for basic common stock $ 33,514     $ 45,295     $ 98,450 $ 94,374
Weighted average number of shares for basic:                
Common shares, As reported - basic 11,682     12,228     11,878 12,268
Net income per share for basic:                
Net income per common share - basic $ 2.87     $ 3.7     $ 8.29 $ 7.69
Common Class A                
Allocation of net income for basic:                
Allocation of net income for basic common stock $ 27,500     $ 37,542     $ 81,082 $ 78,276
Weighted average number of shares for basic:                
Common shares, As reported - basic 9,586     10,135     9,783 10,175
Net income per share for basic:                
Net income per common share - basic $ 2.87     $ 3.7     $ 8.29 $ 7.69
Common Class B                
Allocation of net income for basic:                
Allocation of net income for basic common stock $ 5,933     $ 7,660     $ 17,140 $ 15,908
Weighted average number of shares for basic:                
Common shares, As reported - basic 2,068     2,068     2,068 2,068
Net income per share for basic:                
Net income per common share - basic $ 2.87     $ 3.7     $ 8.29 $ 7.69
Unvested participating shares                
Allocation of net income for basic:                
Allocation of net income for basic unvested participating shares $ 81     $ 93     $ 228 $ 190
Weighted average number of shares for basic:                
Common shares, As reported - basic 28     25     27 25