ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 26, 2014		Sep. 27, 2013	Sep. 26, 2014		Sep. 27, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	$ (1,087)		$ 109	$ (997)		$ (439)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(81)		(30)	372		(37)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period				2,033
Current-period other comprehensive income	(1,168)		79	(625)	[1]	(476)
Balance at end of period	1,408			1,408
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax				(997)	[1]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period				2,129
Balance at end of period	1,132			1,132
Unrealized gain (loss) on marketable securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax				372	[1],[2]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period				(96)	[2]
Balance at end of period	$ 276	[2]		$ 276	[2]

[1] The tax impact of the components of other comprehensive income was immaterial.

[2] Consists of deferred compensation plan accounts, which includes mutual funds and available-for-sale securities. Available-for-sale securities which give rise to gains and losses are limited to our investments in select certificates of deposit.