Investments In and Advances to Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 03, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Proportionate share of income (losses)			$ (841)	$ (28,165)	$ (25,246)
Income (loss) services agreement			$ 200
Georgia Physicians for Accountable Care, LLC
Schedule of Equity Method Investments [Line Items]
Aggregate cost	$ 3,000
Economic interest percentage	27.00%		26.00%
Ownership interest	28.00%		28.00%
Proportionate share of income (losses)			$ (800)
Evolent Health LLC
Schedule of Equity Method Investments [Line Items]
Proportionate share of income (losses)		$ (28,200)			(25,200)
Amortization of basis differential		$ 800			$ 2,000
Class B | Georgia Physicians for Accountable Care, LLC
Schedule of Equity Method Investments [Line Items]
Number of shares acquired	21,429