XML 53 R42.htm IDEA: XBRL DOCUMENT v3.21.2
Net Income per Share - Computation of Diluted Net Income Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 26, 2021
Jun. 27, 2020
Jun. 26, 2021
Jun. 27, 2020
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Earnings to Common Shareholders, As reported - basic $ 59,195 $ 60,141 $ 124,760 $ 78,375
Weighted-average number of common shares — basic 12,283 12,196 12,277 12,177
EPS, As reported - basic $ 4.82 $ 4.93 $ 10.16 $ 6.44
Add: effect of dilutive potential common shares Share-based awards 160 138 161 126
Earnings to Common Shareholders, Net effect of unvested participating shares $ 217 $ 4 $ 513 $ 5
Common Shares, Net effect of unvested participating shares 66   73  
Earnings to Common Shareholders, Net income per common share — diluted $ 59,195 $ 59,770 $ 124,760 $ 77,854
Common Shares, Net income per common share — diluted 12,465 12,258 12,461 12,221
EPS, Net income per common share — diluted $ 4.75 $ 4.88 $ 10.01 $ 6.37
Common Class A        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Earnings to Common Shareholders, As reported - basic $ 48,710 $ 47,930 $ 102,354 $ 61,612
Weighted-average number of common shares — basic 10,108 9,720 10,072 9,572
EPS, As reported - basic $ 4.82 $ 4.93 $ 10.16 $ 6.44
Common Class B        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Earnings to Common Shareholders, As reported - basic $ 10,268 $ 11,836 $ 21,893 $ 16,237
Weighted-average number of common shares — basic [1] 2,131 2,400 2,155 2,523
EPS, As reported - basic $ 4.82 $ 4.93 $ 10.16 $ 6.44
Earnings to Common Shareholders, Class B Common Stock     $ 21,893 $ 16,237
Class B Common Stock     2,155 2,523
[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.