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SEGMENT INFORMATION SEGMENT GEOGRAPHICAL (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 25, 2015
Sep. 25, 2015
Jun. 26, 2015
Mar. 27, 2015
Dec. 26, 2014
Sep. 26, 2014
Jun. 27, 2014
Mar. 28, 2014
Dec. 25, 2015
Dec. 26, 2014
Dec. 27, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Sales Revenue, Services, Net $ 810,733 $ 683,918 $ 627,714 $ 573,315 $ 691,390 $ 633,365 $ 453,227 $ 396,063 $ 2,695,680 $ 2,174,045 $ 1,668,929
Sales Revenue, Services, Percent of Revenue                 100.00% 100.00% 100.00%
UNITED STATES                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Sales Revenue, Services, Net                 $ 2,603,085 $ 2,096,958 $ 1,617,884
Sales Revenue, Services, Percent of Revenue                 96.60% 96.50% 96.90%
Outside of United States [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Sales Revenue, Services, Net                 $ 92,595 $ 77,087 $ 51,045
Sales Revenue, Services, Percent of Revenue                 3.40% 3.50% 3.10%