Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data	May 28, 2011	May 29, 2010
Current assets:
Allowance for doubtful accounts	$ 4,860	$ 5,193
Non-Current liabilities:
Contingent consideration	$ 33,940	$ 59,792
Stockholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	70,000	70,000
Common stock, shares issued	55,021	54,267
Common stock, shares outstanding	45,389	46,265
Treasury stock, shares	9,632	8,002