INTEREST AND OTHER EXPENSE, NET (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
INTEREST AND OTHER EXPENSE, NET
Interest expense	$ (522)	$ (1,087)	$ (1,779)	$ (4,670)
Interest and dividend income	129	46	252	151
Derivative gain (loss)	(372)	167	(248)	541
Bank and portfolio asset management fees	(293)	(245)	(819)	(631)
Other income (expense), net	100	(174)	2	(863)
Total	$ (958)	$ (1,293)	$ (2,592)	$ (5,472)