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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%

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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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