COMMON STOCK AND STOCK PLANS (Details 2) (USD $)	12 Months Ended
	Dec. 30, 2012 item	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Stock-based compensation plans
Number of stock-based compensation plans	5
Options/SARs
Outstanding at the beginning of the period (in shares)	6,194,500	6,723,250	6,632,200	7,039,850
Granted (in shares)	1,017,500	1,078,500	10,000
Exercised (in shares)	(27,250)	(152,750)	(119,250)
Forfeited (in shares)	(1,217,750)	(132,250)	(44,250)
Expired (in shares)	(301,250)	(702,450)	(254,150)
Outstanding at the end of the period (in shares)	6,194,500	6,723,250	6,632,200	7,039,850
Vested and Expected to Vest at the end of the period (in shares)	5,970,603
Options exercisable (in shares)	3,826,250	4,082,500	3,572,450
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 22.01	$ 26.82	$ 26.79
Granted (in dollars per share)	$ 2.76	$ 4.08	$ 4.96
Exercised (in dollars per share)	$ 1.70	$ 1.73	$ 1.70
Forfeited (in dollars per share)	$ 54.52	$ 3.99	$ 7.07
Expired (in dollars per share)	$ 48.33	$ 47.86	$ 40.53
Outstanding at the end of the period (in dollars per share)	$ 11.45	$ 22.01	$ 26.82	$ 26.79
Vested and Expected to Vest at the end of the period (in dollars per share)	$ 11.74
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	$ 1,846,000	$ 874,000	$ 6,060,000	$ 3,086,000
Exercised (in dollars)	33,000	382,000	388,000
Vested and Expected to Vest at the end of the period (in dollars)	1,810,000
Options exercisable (in dollars)	1,335,000	397,000	869,000
Stock options and SARs
Unrecognized compensation costs
Unrecognized compensation costs for non-vested options & SARs (in dollars)	2,600,000
Weighted average period for unrecognized compensation cost expected to be recognized	2 years 6 months
Weighted Average Exercise Price
Granted (in dollars per share)	$ 2.76	$ 4.08	$ 4.96
RSUs
Stock-based compensation plans
Granted (in shares)	1,082,000	740,000
RSU's
Nonvested at the beginning of the period (in shares)	1,445,000	845,000
Granted (in shares)	1,082,000	740,000
Vested (in shares)	(765,000)
Forfeited (in shares)	(660,000)	(140,000)
Nonvested at the end of the period (in shares)	1,102,000	1,445,000		845,000
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 3.73	$ 3.42
Granted (in dollars per share)	$ 2.59	$ 4.08
Vested (in dollars per share)	$ 3.42
Forfeited (in dollars per share)	$ 3.48	$ 3.70
Outstanding at the end of the period (in dollars per share)	$ 2.98	$ 3.73		$ 3.42
Additional disclosures
Total fair value	2,000,000
Unrecognized compensation costs
Unrecognized compensation costs for non-vested RSUs (in dollars)	$ 1,500,000
Weighted average period for unrecognized compensation cost expected to be recognized	1 year 9 months 18 days
RSUs | Minimum
Stock-based compensation plans
Vesting period	2 years
RSUs | Maximum
Stock-based compensation plans
Vesting period	3 years
Employee Plans
Stock-based compensation plans
Vesting period	4 years
Outstanding grants (in shares)	122,500
Employee Plans | Maximum
Stock-based compensation plans
Terms of award	10 years
Employee Plans | Class A Common Stock
Stock-based compensation plans
Number of stock-based compensation plans	2
2001 Director Plan
Stock-based compensation plans
Outstanding grants (in shares)	21,000
2012 Plan | Stock options and SARs | Maximum
Stock-based compensation plans
Terms of award	10 years
2012 Plan | Class A Common Stock | Non-employee director
Stock-based compensation plans
Granted (in shares)	15,000
Issuance of shares under the plan	150,000
RSU's
Granted (in shares)	15,000
2004 Plan | Stock appreciation rights (SARs)
Stock-based compensation plans
Vesting period	4 years
Terms of award	10 years
2004 Plan | Class A Common Stock
Stock-based compensation plans
Shares reserved for issuance to employees	9,000,000
2004 Plan | Class A Common Stock | Non-employee director
Stock-based compensation plans
Granted (in shares)		15,000
Issuance of shares under the plan		150,000
RSU's
Granted (in shares)		15,000
Purchase Plan | Class A Common Stock
Stock-based compensation plans
Shares reserved for issuance to employees	4,625,000
Purchase price expressed as a percentage of fair market value of common stock	85.00%