Revenue Recognition and Valuation Accounts - Schedule of Allowance for Contractual Discounts and Estimated Uncompensated Care as a Percentage of Gross Segment Accounts Receivable (Detail)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Revenue Recognition And Valuation Accounts [Abstract]
Allowance for Contractual Discounts	52.00%	44.00%
Allowance for Uncompensated Care	21.00%	27.00%