Consolidated Statements of Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	May 25, 2013		May 26, 2012		May 25, 2013		May 26, 2012
Revenues	$ 335,764		$ 320,931		$ 1,002,639		$ 943,915
Operating expenses:
Cost of revenues (1)	208,066	[1]	202,433	[1]	618,038	[1]	599,009	[1]
Selling and administrative expenses (1)	64,786	[1]	59,108	[1]	194,891	[1]	179,429	[1]
Depreciation and amortization	17,115		16,718		51,065		49,615
Total operating expenses	289,967		278,259		863,994		828,053
Income from operations	45,797		42,672		138,645		115,862
Other (income) expense:
Interest expense	464		511		1,324		1,639
Interest income	(781)		(656)		(2,472)		(2,036)
Exchange rate loss	283		457		321		1,028
Total other (income) expense	(34)		312		(827)		631
Income before income taxes	45,831		42,360		139,472		115,231
Provision for income taxes	17,109		14,901		53,348		42,774
Net income	28,722		27,459		86,124		72,457
Weighted average number of shares outstanding – Basic:
Common Stock (in Shares)	19,999		19,936		19,982		19,907
Common Class A [Member]
Other (income) expense:
Net income	22,638		21,587		67,793		56,926
Income per share – Basic:
Common Stock (in Dollars per share)	$ 1.51		$ 1.45		$ 4.53		$ 3.83
Income per share – Diluted:
Common Stock (in Dollars per share)	$ 1.43		$ 1.37		$ 4.29		$ 3.63
Income allocated to – Basic:
Common Stock	22,638		21,587		67,793		56,926
Income allocated to – Diluted:
Common Stock	28,307		26,993		84,747		71,205
Weighted average number of shares outstanding – Basic:
Common Stock (in Shares)	14,993		14,905		14,960		14,872
Weighted average number of shares outstanding – Diluted:
Common Stock (in Shares)	19,820		19,646		19,751		19,600
Dividends per share:
Dividends per share (in Dollars per share)	$ 0.0375		$ 0.0375		$ 0.1125		$ 0.1125
Common Class B [Member]
Other (income) expense:
Net income	5,647		5,381		16,880		14,214
Income per share – Basic:
Common Stock (in Dollars per share)	$ 1.21		$ 1.16		$ 3.63		$ 3.06
Income allocated to – Basic:
Common Stock	$ 5,647		$ 5,381		$ 16,880		$ 14,214
Weighted average number of shares outstanding – Basic:
Common Stock (in Shares)	4,675		4,644		4,656		4,642
Dividends per share:
Dividends per share (in Dollars per share)	$ 0.0300		$ 0.0300		$ 0.0900		$ 0.0900

[1] Exclusive of depreciation on the Company's property, plant and equipment and amortization of its intangible assets.