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ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 25, 2015
Dec. 26, 2014
Dec. 27, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Foreign currency translation adjustment, net of tax $ (14,362) $ (1,281) $ (689)
Unrealized gain (loss) on investments, net of tax (522) 119 (96)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period 871 2,033  
Current-period other comprehensive income (14,884) (1,162) (785)
Balance at end of period (14,013) 871 2,033
Permanent Tax Benefit 3,000    
Foreign currency translation adjustment (1)      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Foreign currency translation adjustment, net of tax (14,362) (1,281)  
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period 848 2,129  
Balance at end of period (13,514) 848 2,129
Unrealized gain (loss) on marketable securities      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unrealized gain (loss) on investments, net of tax (522) 119  
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance at beginning of period 23 (96)  
Balance at end of period $ (499) $ 23 $ (96)