Share-based Compensation - Summary of Share-based Activity (Details)	12 Months Ended
	Aug. 26, 2017 $ / shares shares
Number of Shares
Outstanding at beginning of period (in shares) | shares	610,691
Granted (in shares) | shares	100,340
Exercised (in shares) | shares	(102,225)
Forfeited (in shares) | shares	(8,200)
Outstanding at end of period (in shares) | shares	600,606
Exercisable at end of period (in shares) | shares	116,456
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 83.17
Granted (in dollars per share) | $ / shares	119.83
Exercised (in dollars per share) | $ / shares	50.33
Forfeited (in dollars per share) | $ / shares	76.14
Outstanding at end of period (in dollars per share) | $ / shares	94.98
Exercisable at end of period (in dollars per share) | $ / shares	$ 72.13