Summary Stock Options Outstanding and Exercisable (Detail)	12 Months Ended
	Dec. 26, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding | shares	637,221
Options Exercisable | shares	415,121
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years
Options Exercisable, Weighted Average Contractual Life (Years)	4 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 47.24
Options Exercisable, Weighted Average Exercise Price	45.12
Range One
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum Exercise Price	35.64
Maximum Exercise Price	$ 40.00
Options Outstanding | shares	83,612
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 37.04
Range Two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum Exercise Price	40.01
Maximum Exercise Price	$ 45.00
Options Outstanding | shares	215,803
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 42.12
Range Three
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum Exercise Price	45.01
Maximum Exercise Price	$ 58.06
Options Outstanding | shares	337,806
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price per Share	$ 53.04
Range Four
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum Exercise Price	35.64
Maximum Exercise Price	$ 40.00
Options Exercisable | shares	83,612
Options Exercisable, Weighted Average Contractual Life (Years)	3 years 7 months 6 days
Options Exercisable, Weighted Average Exercise Price	$ 37.04
Range Five
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Minimum Exercise Price	40.01
Maximum Exercise Price	$ 45.00
Options Exercisable | shares	169,103
Options Exercisable, Weighted Average Contractual Life (Years)	3 years 7 months 6 days
Options Exercisable, Weighted Average Exercise Price	$ 42.23
Range Six
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	162,406
Options Exercisable, Weighted Average Contractual Life (Years)	5 years 8 months 12 days
Options Exercisable, Weighted Average Exercise Price	$ 52.28