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ACQUISITION AND DIVESTITURE TMP (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 4 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 12, 2018 | Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Sep. 30, 2018 | Oct. 01, 2017 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash purchase price, net of cash acquired |  |  |  |  | $ 22,742 | $ 0 |
Acquisition-related costs |  | $ 1,226 | $ 0 |  | 1,683 | 0 |
Goodwill |  | 238,648 |  | $ 238,648 | 238,648 |  | $ 226,694
Revenue from services |  | 680,371 | $ 660,780 |  | 1,849,060 | $ 1,839,146 |
TMP |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash purchase price, net of cash acquired | $ 22,742 |  |  |  |  |  |
Cash acquired from acquisition | 7,000 |  |  |  |  |  |
Acquisition-related costs |  | $ 1,226 |  |  | $ 1,683 |  |
Accounts receivable | 9,770 |  |  |  |  |  |
Prepaid expenses, deposits and other current assets | 337 |  |  |  |  |  |
Property and equipment | 435 |  |  |  |  |  |
Intangible Assets | 8,024 |  |  |  |  |  |
Total assets acquired | 18,566 |  |  |  |  |  |
Accounts payable and other accrued expenses | 9,139 |  |  |  |  |  |
Accrued wages and benefits | 1,642 |  |  |  |  |  |
Income tax payable | 205 |  |  |  |  |  |
Deferred income tax liability | 1,444 |  |  |  |  |  |
Total liabilities assumed | 12,430 |  |  |  |  |  |
Net identifiable assets acquired | 6,136 |  |  |  |  |  |
Goodwill | 16,606 |  |  |  |  |  |
Revenue from services |  |  |  | $ 17,900 |  |  |
Customer relationships | TMP |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible Assets | 6,286 |  |  |  |  |  |
Trade name/trademarks | TMP |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible Assets | $ 1,738 |  |  |  |  |  |
Estimated useful life in years | 14 years |  |  |  |  |  |
Minimum | Customer relationships | TMP |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Estimated useful life in years | 3 years |  |  |  |  |  |
Maximum | Customer relationships | TMP |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Estimated useful life in years | 7 years |  |  |  |  |  |

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