Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Allowance on trade accounts receivable	$ 8,252	$ 8,650
Allowance on other receivables	3,955	4,657
Accumulated depreciation and amortization on operating property	$ 157,901	$ 158,999
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	160,000,000	160,000,000
Common stock, issued shares	67,013,297	66,859,864
Treasury stock, shares	21,296,347	20,411,736