COMMON STOCK AND STOCK PLANS - Activity and FV (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2015 USD ($) item $ / shares shares	Dec. 28, 2014 USD ($) $ / shares shares	Dec. 29, 2013 USD ($) $ / shares shares	May. 31, 2012 shares
Stock Plans Activity
Number of stock-based compensation plans | item	2
Options/SARs
Outstanding at the beginning of the period (in shares)	3,848,750	6,110,500	6,194,500
Granted (in shares)			775,000
Exercised (in shares)		(1,678,250)	(545,750)
Forfeited (in shares)	(68,750)	(67,250)	(58,500)
Expired (in shares)	(578,750)	(516,250)	(254,750)
Outstanding at the end of the period (in shares)	3,201,250	3,848,750	6,110,500
Vested and Expected to Vest at the end of the period (in shares)	3,179,366
Options exercisable (in shares)	2,774,125	2,719,750	3,983,875
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 9.28	$ 9.69	$ 11.45
Granted (in dollars per share) | $ / shares			2.46
Exercised (in dollars per share) | $ / shares		2.86	1.72
Forfeited (in dollars per share) | $ / shares	2.61	3.38	3.30
Expired (in dollars per share) | $ / shares	20.76	35.74	48.97
Outstanding at the end of the period (in dollars per share) | $ / shares	7.35	$ 9.28	$ 9.69
Vested and Expected to Vest at the end of the period (in dollars per share) | $ / shares	$ 8.09
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars) | $	$ 1,542	$ 2,384	$ 1,846
Exercised (in dollars) | $		3,138	847
Outstanding at the end of the period (in dollars) | $		1,542	2,384
Options exercisable (in dollars) | $		$ 716	$ 1,306
2004 Plan
Stock Plans Activity
Vesting period	4 years
Terms of award	10 years
Stock options and SARs
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Unrecognized compensation costs | $	$ 300
Period in which compensation costs will be recognized	1 year 1 month 6 days
Weighted Average Exercise Price
Granted (in dollars per share) | $ / shares			$ 2.46
Stock Appreciation Rights (SARs) [Member]
Stock Plans Activity
Vesting period	4 years
Stock Appreciation Rights (SARs) [Member] | 2012 Plan | Maximum
Stock Plans Activity
Terms of award	10 years
RSUs
Stock Plans Activity
Granted (in shares)	1,365,300	856,950	483,150
RSU's
Nonvested at the beginning of the period (in shares)	1,329,550	1,231,650	1,102,000
Granted (in shares)	1,365,300	856,950	483,150
Vested (in shares)	(970,000)	(717,150)	(320,000)
Forfeited (in shares)	(186,050)	(41,900)	(33,500)
Nonvested at the end of the period (in shares)	1,538,800	1,329,550	1,231,650
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 3.62	$ 2.50	$ 2.98
Granted (in dollars per share) | $ / shares	2.28	4.61	2.46
Vested (in dollars per share) | $ / shares	2.85	2.92	4.08
Forfeited (in dollars per share) | $ / shares	3.08	2.93	2.48
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 2.98	$ 3.62	$ 2.50
Additional disclosures
Total fair value | $	$ 1,600
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Unrecognized compensation costs | $	$ 3,000
Period in which compensation costs will be recognized	1 year 9 months 18 days
RSUs | Maximum
Stock Plans Activity
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
Granted (in shares)	15,000	15,000	15,000
Issued (in shares)	150,000	150,000	165,000
RSU's
Granted (in shares)	15,000	15,000	15,000