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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 23, 2016
Sep. 25, 2015
Sep. 23, 2016
Sep. 25, 2015
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]        
Balance at beginning of period     $ (14,013)  
Current-period other comprehensive income $ 2,031 $ (1,716) 4,287 $ (1,987)
Balance at end of period (9,726)   (9,726)  
Foreign currency translation adjustment        
Accumulated Other Comprehensive Loss [Line Items]        
Foreign currency translation adjustment, net of tax 1,247 (881) 3,341 (1,706)
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]        
Balance at beginning of period     (13,514)  
Balance at end of period (10,173)   (10,173)  
Unrealized gain (loss) on marketable securities        
Accumulated Other Comprehensive Loss [Line Items]        
Unrealized gain (loss) on investments, net of tax 784 $ (835) 946 [1] $ (281)
Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]        
Balance at beginning of period [1]     (499)  
Balance at end of period [1] $ 447   $ 447  
[1] Consists of deferred compensation plan accounts, which are comprised of mutual funds classified as available-for-sale securities. The tax impact on unrealized gain on available-for-sale securities was de minimis for the thirty-nine weeks ended September 23, 2016.