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GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 26, 2021 | Dec. 27, 2020 | Dec. 29, 2019 | Mar. 29, 2020
Goodwill [Roll Forward] |  |  |  |
Goodwill before impairment | $ 330,441 | $ 332,577 |  |
Accumulated impairment charge | (235,568) | (95,079) |  |
Goodwill, net | 94,873 | 237,498 |  |
Foreign currency translation | (335) | (2,136) |  |
Goodwill before impairment | 330,106 | 330,441 | $ 332,577 |
Accumulated impairment charge | (235,568) | (235,568) | (95,079) |
Goodwill, net | 94,538 | 94,873 | 237,498 |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |
Gross carrying amount | 104,082 | 115,470 |  |
Accumulated amortization | (87,871) | (92,541) |  |
Total future amortization | 16,211 | 22,929 |  |
Amortization of intangible assets | 6,700 | 10,100 | 17,900 |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
2022 | 5,786 |  |  |
2023 | 5,132 |  |  |
2024 | 4,158 |  |  |
2025 | 326 |  |  |
2026 | 125 |  |  |
Thereafter | 684 |  |  |
Total future amortization | 16,211 | 22,929 |  |
Indefinite-lived trade name/trademarks | 6,000 | 6,000 |  |
Goodwill, impairment charge |  | (140,489) |  |
Goodwill | 94,538 | 94,873 | 237,498 |
Impairment of finite-lived intangible assets |  | 34,700 |  |
Finite-Lived Intangible Assets, Net | 16,211 | $ 22,929 |  |
Fair value inputs, discount rate, goodwill |  | 12.00% |  |
Minimum |  |  |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Weighted Average Cost of Capital |  | 11.50% |  |
Maximum |  |  |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Weighted Average Cost of Capital |  | 12.00% |  |
Customer relationships |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |
Gross carrying amount | 102,016 | $ 113,382 |  |
Accumulated amortization | (87,134) | (91,956) |  |
Total future amortization | 14,882 | 21,426 |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Total future amortization | 14,882 | 21,426 |  |
Finite-Lived Intangible Assets, Net | 14,882 | 21,426 |  |
Trade names/trademarks |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |
Gross carrying amount | 2,066 | 2,088 |  |
Accumulated amortization | (737) | (585) |  |
Total future amortization | 1,329 | 1,503 |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Total future amortization | 1,329 | 1,503 |  |
Finite-Lived Intangible Assets, Net | 1,329 | 1,503 |  |
PeopleReady |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill before impairment | 106,304 | 106,304 |  |
Accumulated impairment charge | (46,210) | (46,210) |  |
Goodwill, net | 60,094 | 60,094 |  |
Foreign currency translation | 0 | 0 |  |
Goodwill before impairment | 106,304 | 106,304 | 106,304 |
Accumulated impairment charge | (46,210) | (46,210) | (46,210) |
Goodwill, net | 60,094 | 60,094 | 60,094 |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Goodwill, impairment charge |  | 0 |  |
Goodwill | 60,094 | 60,094 | 60,094 |
PeopleManagement |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill before impairment | 81,092 | 81,092 |  |
Accumulated impairment charge | (79,601) | (33,700) |  |
Goodwill, net | 1,491 | 47,392 |  |
Foreign currency translation | 0 | 0 |  |
Goodwill before impairment | 81,092 | 81,092 | 81,092 |
Accumulated impairment charge | (79,601) | (79,601) | (33,700) |
Goodwill, net | 1,491 | 1,491 | 47,392 |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Goodwill, impairment charge |  | (45,901) |  |
Goodwill | 1,491 | 1,491 | 47,392 |
PeopleManagement | On-site [Member] |  |  |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Goodwill |  |  |  | $ 45,900
Impairment of finite-lived intangible assets |  | 9,700 |  |
PeopleManagement | Customer relationships | On-site [Member] |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |
Total future amortization |  | 7,200 |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Total future amortization |  | 7,200 |  |
Finite-Lived Intangible Assets, Net |  | 7,200 |  |
PeopleScout |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill before impairment | 143,045 | 145,181 |  |
Accumulated impairment charge | (109,757) | (15,169) |  |
Goodwill, net | 33,288 | 130,012 |  |
Foreign currency translation | (335) | (2,136) |  |
Goodwill before impairment | 142,710 | 143,045 | 145,181 |
Accumulated impairment charge | (109,757) | (109,757) | (15,169) |
Goodwill, net | 32,953 | 33,288 | 130,012 |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Goodwill, impairment charge |  | (94,588) |  |
Goodwill | 32,953 | 33,288 | $ 130,012 |
PeopleScout | RPO |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, net | 23,600 |  |  |
Goodwill, net |  | 23,600 |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Goodwill, impairment charge |  | (92,200) |  |
Goodwill |  | 23,600 |  |
Impairment of finite-lived intangible assets |  | 25,000 |  |
PeopleScout | MSP [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill, net | $ 9,700 |  |  |
Goodwill, net |  | 9,700 |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Goodwill, impairment charge |  | (2,400) |  |
Goodwill |  | 9,700 |  |
PeopleScout | Customer relationships | RPO |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |
Total future amortization |  | 5,100 |  |
Estimated future amortization of finite-lived intangible assets [Abstract] |  |  |  |
Total future amortization |  | 5,100 |  |
Finite-Lived Intangible Assets, Net |  | $ 5,100 |  |

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