Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 26, 2016	Sep. 26, 2015	Mar. 28, 2015
Accounts receivable allowance for doubtful accounts	$ 23,759	$ 19,296	$ 20,813
Common Stock
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	11,908,317	11,908,317	11,919,749
Class A Common Stock
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	36,794,100	36,462,299	35,765,091
Class B Stock
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	1,652,262	1,652,262	1,652,262