Discontinued Operations - Net Assets Held for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets:
Due premiums	$ 3,945	$ 8,840
Other receivables	64,678	118,692
Total assets related to discontinued operations	68,623	127,532
Liabilities:
Risk sharing payable	9,126	8,374
Current and deferred income taxes payable	1,910	3,820
Other	28,113	15,230
Total liabilities related to discontinued operations	39,149	27,424
Net assets	29,474	100,108
Centers for Medicare and Medicaid Services [Member]
Assets:
Other receivables	65,000	50,000
Liabilities:
Contingent purchase price reserve remaining	$ 25,600	3,600
Drug Manufacturers [Member]
Assets:
Other receivables		$ 69,000