Discontinued Operations - Net Assets Held For Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Total assets related to discontinued operations	$ 127,532	$ 312,843
Liabilities:
Total liabilities related to discontinued operations	27,424	51,035
Medicare Part D
Assets:
Due premiums	8,840	8,041
Other receivables	118,692	287,765
Deferred acquisition costs	0	17,037
Total assets related to discontinued operations	127,532	312,843
Liabilities:
Unearned and advance premiums	67	806
Policy claims and other benefits payable	10,868	12,309
Risk sharing payable	8,374	23,837
Current and deferred income taxes payable	3,820	13,604
Other	4,295	479
Total liabilities related to discontinued operations	27,424	51,035
Net assets	100,108	261,808
Amounts of contingent liabilities remaining	3,600
Centers for Medicare and Medicaid Services | Medicare Part D
Assets:
Other receivables	50,000	193,000
Drug Manufacturers | Medicare Part D
Assets:
Other receivables	$ 69,000	$ 95,000