Shareholders' Equity and Noncontrolling Interest - Noncontrolling Interest (Details) - shares |
May 04, 2017 |
Sep. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|---|---|
| Noncontrolling Interest [Line Items] | ||||
| Ownership interest of non-controlling interest | 6.90% | 7.60% | ||
| Common Stock Class C | ||||
| Noncontrolling Interest [Line Items] | ||||
| Common stock, shares outstanding (shares) | 19,155,921 | 19,155,921 | ||
| Common Stock Class A | ||||
| Noncontrolling Interest [Line Items] | ||||
| Common stock, shares outstanding (shares) | 256,670,839 | 200,835,049 | ||
| Subscription Agreements | Common Stock Class A | ||||
| Noncontrolling Interest [Line Items] | ||||
| Shares issued in transaction (in shares) | 23,500,000 |