CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
CONSOLIDATED CONDENSED BALANCE SHEETS
Allowance for doubtful trade accounts (in dollars)	$ 10,996	$ 9,186
PROPERTY AND EQUIPMENT, depreciation and amortization (in dollars)	$ 97,193	$ 93,179
Series C junior participating convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Series C junior participating convertible preferred stock, liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Series C junior participating convertible preferred stock, shares authorized	36,900	36,900
Series C junior participating convertible preferred stock, shares outstanding	36,375	36,375
Series C junior participating convertible preferred stock, convertible into common stock shares	26,944,444	26,944,444
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	122,104,943	121,890,871
Common stock, shares outstanding	122,104,943	121,890,871