COMMON STOCK AND STOCK PLANS - Activity and FV (Details) (USD $)	12 Months Ended
	Dec. 28, 2014 item	Dec. 29, 2013	Dec. 30, 2012	May 31, 2012
Stock Plans Activity
Number of stock-based compensation plans	2
Options/SARs
Outstanding at the beginning of the period (in shares)	6,110,500	6,194,500	6,723,250
Granted (in shares)		775,000	1,017,500
Exercised (in shares)	(1,678,250)	(545,750)	(27,250)
Forfeited (in shares)	(67,250)	(58,500)	(1,217,750)
Expired (in shares)	(516,250)	(254,750)	(301,250)
Outstanding at the end of the period (in shares)	3,848,750	6,110,500	6,194,500
Vested and Expected to Vest at the end of the period (in shares)	3,763,184
Options exercisable (in shares)	2,719,750	3,983,875	3,826,250
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 9.69	$ 11.45	$ 22.01
Granted (in dollars per share)		$ 2.46	$ 2.76
Exercised (in dollars per share)	$ 2.86	$ 1.72	$ 1.70
Forfeited (in dollars per share)	$ 3.38	$ 3.30	$ 54.52
Expired (in dollars per share)	$ 35.74	$ 48.97	$ 48.33
Outstanding at the end of the period (in dollars per share)	$ 9.28	$ 9.69	$ 11.45
Vested and Expected to Vest at the end of the period (in dollars per share)	$ 9.43
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars)	$ 2,384,000	$ 1,846,000	$ 874,000
Exercised (in dollars)	3,138,000	847,000	33,000
Outstanding at the end of the period (in dollars)	1,542,000	2,384,000	1,846,000
Vested and Expected to Vest at the end of the period (in dollars)	1,467,000
Options exercisable (in dollars)	716,000	1,306,000	1,335,000
2004 Plan
Stock Plans Activity
Terms of award	10 years
Stock options and SARs
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 8 months 12 days
Weighted Average Exercise Price
Granted (in dollars per share)		$ 2.46	$ 2.76
Stock Appreciation Rights (SARs) [Member]
Stock Plans Activity
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Stock Appreciation Rights (SARs) [Member] | 2012 Plan | Maximum
Stock Plans Activity
Terms of award	10 years
RSUs
Stock Plans Activity
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	856,950	483,150	1,082,000
RSU's
Nonvested at the beginning of the period (in shares)	1,231,650	1,102,000	1,445,000
Granted (in shares)	856,950	483,150	1,082,000
Vested (in shares)	(717,150)	(320,000)	(765,000)
Forfeited (in shares)	(41,900)	(33,500)	(660,000)
Nonvested at the end of the period (in shares)	1,329,550	1,231,650	1,102,000
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 2.50	$ 2.98	$ 3.73
Granted (in dollars per share)	$ 4.61	$ 2.46	$ 2.59
Vested (in dollars per share)	$ 2.92	$ 4.08	$ 3.42
Forfeited (in dollars per share)	$ 2.93	$ 2.48	$ 3.48
Outstanding at the end of the period (in dollars per share)	$ 3.62	$ 2.50	$ 2.98
Additional disclosures
Total fair value	3,400,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 2,900,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years
RSUs | Maximum
Stock Plans Activity
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Common Class A | 2004 Plan
Stock Plans Activity
Shares reserved for issuance to employees	9,000,000
Common Class A | 2012 Plan
Stock Plans Activity
Outstanding grants (in shares)				5,000,000
Common Class A | Non-employee director | 2012 Plan
Stock Plans Activity
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	15,000	15,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	150,000	165,000
RSU's
Granted (in shares)	15,000	15,000