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Net (Loss) Income per Share - Computation of (Loss) Diluted Net Income Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 25, 2021
Sep. 26, 2020
Sep. 25, 2021
Sep. 26, 2020
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]        
Earnings (Loss) to Common Shareholders, As reported - basic $ (58,421) $ 80,768 $ 66,338 $ 159,143
Weighted-average number of common shares — basic 12,282 12,221 12,279 12,191
EPS, As reported - basic $ (4.76) $ 6.61 $ 5.40 $ 13.05
Add: effect of dilutive potential common shares Share-based awards   179 151 145
Earnings (Loss) to Common Shareholders, Net effect of unvested participating shares $ (180) $ 6 $ 250 $ 12
Common Shares, Net effect of unvested participating shares 38   67  
Earnings (Loss) to Common Shareholders, Net (loss) income per common share - diluted $ (58,421) $ 80,334 $ 66,338 $ 158,154
Common Shares, Net (loss) income per common share - diluted 12,282 12,333 12,450 12,259
EPS, Net (loss) income per common share - diluted $ (4.76) $ 6.51 $ 5.33 $ 12.90
Common Class A        
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]        
Earnings (Loss) to Common Shareholders, As reported - basic $ (48,356) $ 65,074 $ 54,586 $ 126,146
Weighted-average number of common shares — basic 10,166 9,846 10,103 9,663
EPS, As reported - basic $ (4.76) $ 6.61 $ 5.40 $ 13.05
Common Class B        
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]        
Earnings (Loss) to Common Shareholders, As reported - basic $ (9,885) $ 15,254 $ 11,502 $ 31,996
Weighted-average number of common shares — basic [1] 2,078 2,308 2,129 2,451
EPS, As reported - basic $ (4.76) $ 6.61 $ 5.40 $ 13.05
Earnings (Loss) to Common Shareholders, Class B Common Stock $ (9,885) $ 15,254 $ 11,502 $ 31,996
Class B Common Stock 2,078 2,308 2,129 2,451
[1] Change in Class B Common Stock resulted from the conversion of 130,000 shares to Class A Common Stock on November 3, 2020 and 99,983 shares to Class A Common Stock on May 14, 2021 with the ending number of shares reflecting the weighted average for the period.