Significant Accounting Policies (Concentration of Credit Risk) (Details)	12 Months Ended
	Dec. 31, 2013 Ten Largest Employer Group Premium Receivables [Member] Customers	Dec. 31, 2012 Ten Largest Employer Group Premium Receivables [Member]	Dec. 31, 2013 Medicare Receivable From CMS [Member]	Dec. 31, 2012 Medicare Receivable From CMS [Member]	Dec. 31, 2013 Ten Largest Employer Group Health Plan Services Premium Revenues [Member] Customers	Dec. 31, 2012 Ten Largest Employer Group Health Plan Services Premium Revenues [Member]	Dec. 31, 2011 Ten Largest Employer Group Health Plan Services Premium Revenues [Member]	Dec. 31, 2013 Medicare Health Plan Premium Revenues [Member]	Dec. 31, 2012 Medicare Health Plan Premium Revenues [Member]	Dec. 31, 2011 Medicare Health Plan Premium Revenues [Member]	Dec. 31, 2013 Los Angles County Medi-Cal Revenue to Medicaid Revenue Ratio [Member]	Dec. 31, 2012 Los Angles County Medi-Cal Revenue to Medicaid Revenue Ratio [Member]	Dec. 31, 2013 Los Angeles County Medi-Cal Revenue to Health Plan Premiums Ratio [Member]	Dec. 31, 2012 Los Angeles County Medi-Cal Revenue to Health Plan Premiums Ratio [Member]	Dec. 31, 2013 Government Contracts Concentration Risk [Member]	Dec. 31, 2012 Los Angeles County Contract with DHCS [Member]	Dec. 31, 2010 Los Angeles County Contract with DHCS [Member]
Significant Accounting Policies [Line Items]
Entity-Wide Revenue, Major Customer, Number	10				10
Concentration risk, percentage	14.00%	14.00%	21.00%	25.00%	16.00%	17.00%	18.00%	27.00%	27.00%	25.00%	46.00%	44.00%	11.00%	8.00%	95.00%
Current DHCS contract period																24 months	24 months