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SELECTED QUARTERLY FINANCIAL DATA (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 01, 2017 | Sep. 23, 2016 | Jun. 24, 2016 | Mar. 25, 2016 | Dec. 25, 2015 | Sep. 25, 2015 | Jun. 26, 2015 | Mar. 27, 2015 | Jan. 01, 2017 | Dec. 25, 2015 | Dec. 26, 2014
Selected Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue from services | $ 734,951 | $ 697,097 | $ 672,612 | $ 645,980 | $ 810,733 | $ 683,918 | $ 627,714 | $ 573,315 | $ 2,750,640 | $ 2,695,680 | $ 2,174,045
Cost of services | 554,064 | 518,702 | 502,688 | 495,468 | 625,729 | 515,051 | 475,748 | 443,479 | 2,070,922 | 2,060,007 | 1,637,066
Gross profit | 180,887 | 178,395 | 169,924 | 150,512 | 185,004 | 168,867 | 151,966 | 129,836 | 679,718 | 635,673 | 536,979
Selling, general and administrative expense | 145,387 | 134,679 | 135,787 | 130,624 | 141,419 | 125,117 | 117,859 | 111,593 | 546,477 | 495,988 | 425,777
Depreciation and amortization | 12,019 | 11,690 | 11,694 | 11,289 | 10,428 | 10,498 | 10,397 | 10,520 | 46,692 | 41,843 | 29,474
Goodwill and intangible asset impairment charge | 0 | 4,275 | 99,269 | 0 |  |  |  |  | 103,544 | 0 | 0
Income (loss) from operations | 23,481 | 27,751 | (76,826) | 8,599 | 33,157 | 33,252 | 23,710 | 7,723 | (16,995) | 97,842 | 81,728
Interest expense | (1,736) | (1,721) | (1,740) | (1,969) | (1,180) | (933) | (881) | (1,166) | (7,166) | (4,160) | (3,156)
Interest and other income | 1,164 | 854 | 853 | 950 | 887 | 567 | 679 | 632 | 3,821 | 2,765 | 3,272
Interest and other income (expense), net | (572) | (867) | (887) | (1,019) | (293) | (366) | (202) | (534) | (3,345) | (1,395) | 116
Income (loss) before tax expense | 22,909 | 26,884 | (77,713) | 7,580 | 32,864 | 32,886 | 23,508 | 7,189 | (20,340) | 96,447 | 81,844
Income tax expense (benefit) | 4,822 | 3,455 | (13,978) | 612 | 4,696 | 12,796 | 6,235 | 1,473 | (5,089) | 25,200 | 16,169
Net income (loss) | $ 18,087 | $ 23,429 | $ (63,735) | $ 6,968 | $ 28,168 | $ 20,090 | $ 17,273 | $ 5,716 | $ (15,251) | $ 71,247 | $ 65,675
Basic (in dollars per share) | $ 0.43 | $ 0.56 | $ (1.53) | $ 0.17 | $ 0.68 | $ 0.49 | $ 0.42 | $ 0.14 | $ (0.37) | $ 1.73 | $ 1.61
Diluted (in dollars per share) | $ 0.43 | $ 0.56 | $ (1.53) | $ 0.17 | $ 0.67 | $ 0.48 | $ 0.42 | $ 0.14 | $ (0.37) | $ 1.71 | $ 1.59

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