SEGMENT INFORMATION - Schedule of Provisions for Contractual Discounts and Estimated Uncompensated Care as a Percentage of Gross Billings (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting [Abstract]
Provision for contractual discounts	60.00%	60.00%	60.00%	59.00%
Provision for uncompensated care	9.00%	5.00%	9.00%	7.00%