Summary of Significant Accounting Policies - Redeemable common stock - (Details) - USD ($) |
9 Months Ended | ||
|---|---|---|---|
Feb. 29, 2016 |
Sep. 30, 2016 |
Dec. 31, 2015 |
|
| Offering Costs Policy | |||
| Offering costs | $ 28,315,521 | $ 28,315,521 | |
| Underwriting discounts | 27,500,000 | ||
| Deferred offering cost | 17,500,000 | $ 17,500,000 | |
| Professional, filing, regulatory and other costs | $ 815,521 | ||
| Class A common stock | |||
| Redeemable Common Stock Policy | |||
| Temporary equity outstanding | 47,824,792 | 0 | |
| Redemption limitation, minimum net tangible assets | $ 5,000,001 | ||
| Class A common stock | Common stock | |||
| Redeemable Common Stock Policy | |||
| Shares issued with redemption feature | 50,000,000 |