Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended	9 Months Ended
	Nov. 30, 2012	Oct. 31, 2012	Sep. 30, 2012	Sep. 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
Initial aggregate principal amount of standby letter of credit			17.4	17.4
Letter of credit amendment date			Aug. 20, 2012
Amended maximum principal amount of standby letter of credit			4.3
Shareholder Litigation [Member]
Commitments and Contingencies (Textual) [Abstract]
Lawsuit filling date				August 16, 2012
Amended lawsuit filing date				Aug. 24, 2012
Earliest date of expiration associated with warrants issued in conjuction with the 2.0% Convertible Senior Notes				Aug. 13, 2012
Settlement agreement date				October 2, 2012
Original merger agreement early termination fee				146.0
Amended merger agreement early termination fee				97.0
Original date for the special meeting of stockholders				Oct. 09, 2012
Amended date for the special meeting of stockholders				Oct. 23, 2012
Employment Litigation [Member]
Commitments and Contingencies (Textual) [Abstract]
Lawsuit filling date				November 22, 2010
Date of agreement in principle reached with plaintiffs to settle the litigation				February 2, 2012
Settlement agreement date				August 6, 2012
Louisiana [Member]
Commitments and Contingencies (Textual) [Abstract]
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]
Lawsuit filling date				June 27, 2012
Date a Motion to Intervene was granted by the court			Jul. 09, 2012
Loss contingency, date of dismissal			Jul. 30, 2012
Date oral arguments were heard by the court	Nov. 01, 2012
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
Original effective date of health care contract award				Jan. 01, 2013
Request for Applications issuance date				Jan. 11, 2012
Termination date of Medicaid contract				Jun. 30, 2013
Expected date which membership will transfer to recipients of the new contract			on or before April 2013
Date of notification of delay in program implementation under the new contract		Oct. 05, 2012
Amended effective date of health care contract award		Jul. 01, 2013
Percentage of consolidated premium revenue represented by the Ohio Medicaid contract			approximately 2.0%	approximately 2.0%