Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 25, 2016	Dec. 27, 2015
Consolidated Balance Sheets
Accounts receivable, allowance for doubtful accounts	$ 1,486	$ 2,447
Accounts receivable - affiliates, allowance for doubtful accounts	0	0
Notes receivable, allowance for doubtful accounts	0	0
Notes receivable, less current portion, allowance for doubtful accounts	$ 2,759	$ 3,653
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	44,066	43,731
Treasury stock, shares	7,383	5,308