REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from services	$ 788,732	$ 329,241
Temporary Staffing Services
Disaggregation of Revenue [Line Items]
Revenue from services	771,551	321,381
Other Services
Disaggregation of Revenue [Line Items]
Revenue from services	17,181	7,860
Nurse And Allied Staffing
Disaggregation of Revenue [Line Items]
Revenue from services	765,580	313,008
Nurse And Allied Staffing \| Temporary Staffing Services
Disaggregation of Revenue [Line Items]
Revenue from services	749,447	305,975
Nurse And Allied Staffing \| Other Services
Disaggregation of Revenue [Line Items]
Revenue from services	16,133	7,033
Physician Staffing
Disaggregation of Revenue [Line Items]
Revenue from services	23,152	16,233
Physician Staffing \| Temporary Staffing Services
Disaggregation of Revenue [Line Items]
Revenue from services	22,104	15,406
Physician Staffing \| Other Services
Disaggregation of Revenue [Line Items]
Revenue from services	$ 1,048	$ 827

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 606
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-Name Accounting Standards Codification
-Topic 924
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+ Details