Organization (Details)	9 Months Ended
	Sep. 30, 2012
Organization [Abstract]
Number of medical membership members	33,500,000
Individuals served	63,700,000
Number of states in which the Company is licensed to conduct insurance operations	50
Number of counties in the Kansas City area the Company does not serve	30
Number of counties in the New York City metropolitan area the Company serves as independent licensee	10