Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Allowance on trade accounts receivable	$ 7,284	$ 6,413
Allowance on other receivables	7,667	6,216
Accumulated depreciation and amortization on operating property	$ 280,849	$ 250,153
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	160,000,000	160,000,000
Common stock, issued shares	68,083,419	67,870,962
Treasury stock, shares	28,609,926	27,755,001