CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 24, 2016
Current assets:
Allowance for doubtful accounts	$ 3,044	$ 2,441
Partners' capital:
Common units issued (in units)	61,105,000	60,789,000
Common units outstanding (in units)	61,104,544	60,789,000