XML 1079 R64.htm IDEA: XBRL DOCUMENT v3.20.4
Summary Stock Options Outstanding and Exercisable (Detail)
12 Months Ended
Dec. 26, 2020
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding | shares 17,650
Options Exercisable | shares 17,650
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 1 year 8 months 12 days
Options Exercisable, Weighted Average Contractual Life (Years) 1 year 8 months 12 days
Options Outstanding, Weighted Average Exercise Price per Share $ 54.16
Options Exercisable, Weighted Average Exercise Price 54.16
Range One  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 41.80
Maximum Exercise Price $ 45.00
Options Outstanding | shares 1,500
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share $ 41.80
Range Two  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 45.01
Maximum Exercise Price $ 56.40
Options Outstanding | shares 16,150
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 1 year 10 months 24 days
Options Outstanding, Weighted Average Exercise Price per Share $ 55.31
Range Three  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 41.80
Maximum Exercise Price $ 45.00
Options Exercisable | shares 1,500
Options Exercisable, Weighted Average Contractual Life (Years) 1 month 6 days
Options Exercisable, Weighted Average Exercise Price $ 41.80
Range Four  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Minimum Exercise Price 45.01
Maximum Exercise Price $ 56.40
Options Exercisable | shares 16,150
Options Exercisable, Weighted Average Contractual Life (Years) 1 year 10 months 24 days
Options Exercisable, Weighted Average Exercise Price $ 55.31