Guarantees and Contingencies - Additional Information (Detail)	0 Months Ended	6 Months Ended
	Jun. 26, 2013 Puerto Rico Health Insurance Administration Contracts East Southeast And Southwest Regions	Jun. 30, 2014 New Tricare South Region Contract	Jun. 30, 2014 Military Services	Jun. 30, 2014 Medicaid	Jun. 30, 2014 Medicare
Loss Contingencies [Line Items]
Percentage of premiums and services revenue			1.00%	2.00%	74.00%
Contract term, years	3 years	5 years
Contract expiration date	Jun. 30, 2013	Mar. 31, 2017