FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Minimum [Member]
Fair Value Measurement [Line Items]
Threshold period, past due for payment of services provided (in days)	15 days
Maximum [Member]
Fair Value Measurement [Line Items]
Threshold period, past due for payment of services provided (in days)	60 days
Trade Names [Member] | Physician Staffing [Member]
Fair Value Measurement [Line Items]
Impairment of intangible assets, indefinite-lived (excluding goodwill)		$ 2.1