FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value Measurement [Line Items]
Non-cash impairment charges	$ 24,311	$ 0	$ 24,311	$ 0
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
Physician Staffing [Member]
Fair Value Measurement [Line Items]
Non-cash impairment charges	$ 24,300		$ 24,300
Non-cash impairment charges, net of tax			$ 17,300