Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 28, 2015	Sep. 27, 2014	Mar. 29, 2014
Accounts receivable allowance for doubtful accounts	$ 20,813	$ 25,212	$ 24,771
Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	11,919,749	12,437,307	12,308,802
Class A Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	35,765,091	36,887,311	36,417,849
Class B Stock [Member]
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	1,652,262	1,652,262	1,652,262