Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Letter of Credit [Member]
Commitments and Contingencies (Textual) [Abstract]
Letter of credit renewal date		Jul. 01, 2012
Letter of credit initiation date		Jul. 01, 2009
Aggregate principal amount of standby letter of credit	17.4	17.4
Employment Litigation [Member]
Commitments and Contingencies (Textual) [Abstract]
Employment litigation, lawsuit filling date		November 22, 2010
Employment litigation, date of agreement in principle reached with plaintiffs to settle the litigation		February 2, 2012
Employment litigation, date the court granted preliminary approval of the settlement		Apr. 20, 2012
Employment litigation, scheduled fairness hearing date		Aug. 06, 2012
Louisiana [Member]
Commitments and Contingencies (Textual) [Abstract]
Employment litigation, lawsuit filling date		On or about September 9, 2011 and on February 2, 2012
Louisiana Medicaid contract award date		Jul. 25, 2011
Number of Coordinated Care Network Medicaid managed care organizations within Louisiana		5
Number of healthcare providers challenging the Louisiana contract award		2
Ohio [Member]
Commitments and Contingencies (Textual) [Abstract]
Date of notification by the Ohio Department of Job and Family Services that the Company was not awarded a contract award for the next contract year		Apr. 06, 2012
Termination date of Medicaid contract		Jun. 30, 2013
Maximum [Member] | Ohio [Member]
Commitments and Contingencies (Textual) [Abstract]
Percentage of consolidated premium revenue represented by the Ohio Medicaid contract	2.00%	3.00%