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GOODWILL, TRADE NAMES, AND OTHER INTANGIBLE ASSETS - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]            
Impairment charges   $ 0 $ 0 $ 0 $ 24,311,000 $ 0
Physician Staffing [Member]            
Finite-Lived Intangible Assets [Line Items]            
Impairment charges $ 24,300,000          
Goodwill impairment charge 17,700,000          
Customer relationships [Member] | Physician Staffing [Member]            
Finite-Lived Intangible Assets [Line Items]            
Impairment of intangibles finite lived 6,000,000          
Trade names [Member] | Physician Staffing [Member]            
Finite-Lived Intangible Assets [Line Items]            
Impairment of intangibles indefinite lived $ 600,000