CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) AND REDEEMABLE PREFERRED STOCK - USD ($) shares in Thousands, $ in Thousands | Total | Class A Common Stock | Class B Common Stock | Preferred StockSeries A Redeemable Preferred Stock | Preferred StockSeries B Redeemable Preferred Stock | Preferred StockSeries B-1 Redeemable Preferred Stock | Preferred StockSeries A Preferred Stock | Common StockClass A Common Stock | Common StockClass B Common Stock | Additional Paid-in Capital | Additional Paid-in CapitalClass A Common Stock | Additional Paid-in CapitalClass B Common Stock | Retained Earnings (Accumulated Deficit) | Non-controlling Interests | Non-controlling InterestsClass B Common Stock |
Beginning balance, shares at Dec. 31, 2014 | | | | 7,900 | 6,468 | 360 | | | | | | | | | |
Beginning balance, amount at Dec. 31, 2014 | | | | $ 12,847 | $ 24,833 | $ 1,593 | | | | | | | | | |
Increase (Decrease) in Temporary Equity [Roll Forward] | | | | | | | | | | | | | | | |
Conversion of existing equity, shares | | | | (7,900) | (6,468) | (360) | | | | | | | | | |
Conversion of existing equity, amount | | | | $ (12,847) | $ (24,833) | $ (1,593) | | | | | | | | | |
Ending balance, shares at Dec. 31, 2015 | | | | 0 | 0 | 0 | | | | | | | | | |
Ending balance, amount at Dec. 31, 2015 | | | | $ 0 | $ 0 | $ 0 | | | | | | | | | |
Beginning balance, shares at Dec. 31, 2014 | | | | | | | 7,400 | 4,048 | 0 | | | | | | |
Beginning balance, amount at Dec. 31, 2014 | $ (2,070) | | | | | | $ 2 | $ 1 | $ 0 | $ 23,733 | | | $ (25,806) | $ 0 | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | |
Non-cash issuance of common stock to Evolent Health, LLC | 21,810 | | | | | | | | | 21,810 | | | | | |
Net income (loss) prior to Offering Reorganization | (28,165) | | | | | | | | | | | | (28,165) | | |
Conversion of existing equity, shares | | | | | | | (7,400) | 22,128 | | | | | | | |
Conversion of existing equity, amount | 39,273 | | | | | | $ (2) | $ 261 | | 39,014 | | | | | |
Issuance of common stock, shares | | | | | | | | 13,225 | 19,576 | | | | | | |
Issuance of common stock, amount | | $ 205,933 | $ 332,793 | | | | | $ 132 | $ 196 | | $ 205,801 | $ (196) | | | $ 332,793 |
Issuance of common stock for business combinations, shares | | | | | | | | 2,051 | (2,051) | | | | | | |
Issuance of common stock for business combinations, value | 0 | | | | | | | $ 21 | $ (21) | 34,875 | | | | (34,875) | |
Tax effect of the Offering Reorganization | 2,144 | | | | | | | | | 2,144 | | | | | |
Stock-based compensation subsequent to the Offering Reorganization | 14,730 | | | | | | | | | 14,730 | | | | | |
Exercise of stock options, shares | | | | | | | | 39 | | | | | | | |
Exercise of stock options, amount | 152 | | | | | | | | | 152 | | | | | |
Net income (loss) subsequent to Offering Reorganization, including portion attributable to noncontrolling interest | | | | | | | | | | | | | 360,659 | | |
Net income (loss) subsequent to Offering Reorganization, portion attributable to noncontrolling interest | | | | | | | | | | | | | | (12,680) | |
Net income (loss) subsequent to Offering Reorganization | 347,979 | | | | | | | | | | | | | | |
Ending balance, shares at Dec. 31, 2015 | | | | | | | 0 | 41,491 | 17,525 | | | | | | |
Ending balance, amount at Dec. 31, 2015 | 934,579 | | | | | | $ 0 | $ 415 | $ 175 | 342,063 | | | 306,688 | 285,238 | |
Beginning balance, shares at Dec. 31, 2015 | | | | 0 | 0 | 0 | | | | | | | | | |
Beginning balance, amount at Dec. 31, 2015 | | | | $ 0 | $ 0 | $ 0 | | | | | | | | | |
Ending balance, shares at Jun. 30, 2016 | | | | 0 | 0 | 0 | | | | | | | | | |
Ending balance, amount at Jun. 30, 2016 | | | | $ 0 | $ 0 | $ 0 | | | | | | | | | |
Beginning balance, shares at Dec. 31, 2015 | | | | | | | 0 | 41,491 | 17,525 | | | | | | |
Beginning balance, amount at Dec. 31, 2015 | 934,579 | | | | | | $ 0 | $ 415 | $ 175 | 342,063 | | | 306,688 | 285,238 | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | |
Cumulative-effect adjustment from adoption of new accounting principle | 468 | | | | | | | | | 468 | | | | | |
Non-cash issuance of common stock to Evolent Health, LLC | 0 | | | | | | | | | | | | | | |
Issuance of common stock for business combinations, shares | | | | | | | | 1,067 | | | | | | | |
Issuance of common stock for business combinations, value | 10,534 | | | | | | | $ 11 | | 10,523 | | | | | |
Stock-based compensation subsequent to the Offering Reorganization | 9,045 | | | | | | | | | 9,045 | | | | | |
Exercise of stock options, shares | | | | | | | | 45 | | | | | | | |
Exercise of stock options, amount | 114 | | | | | | | | | 114 | | | | | |
Restricted stock units vested, net of shares withheld for taxes, shares | | | | | | | | 66 | | | | | | | |
Restricted stock units vested, net of shares withheld for taxes, amount | (318) | | | | | | | | | (318) | | | | | |
Net income (loss) subsequent to Offering Reorganization, portion attributable to noncontrolling interest | (54,822) | | | | | | | | | | | | | (54,822) | |
Net income (loss) attributable to Evolent Health, Inc. | (131,456) | | | | | | | | | | | | (131,456) | | |
Net income (loss), including portion attributable to noncontrolling interest | (186,278) | | | | | | | | | | | | | | |
Ending balance, shares at Jun. 30, 2016 | | | | | | | 0 | 42,669 | 17,525 | | | | | | |
Ending balance, amount at Jun. 30, 2016 | 768,144 | | | | | | $ 0 | $ 426 | $ 175 | 361,895 | | | 175,232 | 230,416 | |
Ending balance, shares at Jun. 30, 2016 | | | | 0 | 0 | 0 | | | | | | | | | |
Ending balance, amount at Jun. 30, 2016 | | | | $ 0 | $ 0 | $ 0 | | | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | | | | | |
Net income (loss) subsequent to Offering Reorganization, portion attributable to noncontrolling interest | (3,612) | | | | | | | | | | | | | | |
Net income (loss) attributable to Evolent Health, Inc. | (8,387) | | | | | | | | | | | | | | |
Net income (loss), including portion attributable to noncontrolling interest | (11,999) | | | | | | | | | | | | | | |
Ending balance, shares at Jun. 30, 2016 | | | | | | | 0 | 42,669 | 17,525 | | | | | | |
Ending balance, amount at Jun. 30, 2016 | $ 768,144 | | | | | | $ 0 | $ 426 | $ 175 | $ 361,895 | | | $ 175,232 | $ 230,416 | |