Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accumulated amortization of debt financing costs | $ 9,111 | $ 5,192 |
| Property, plant and equipment, accumulated depreciation | 540,774 | 409,161 |
| Finite-lived intangible assets, accumulated amortization | 9,441 | 4,357 |
| Deferred financing costs, current | 3,623 | 3,671 |
| Deferred financing costs | 18,515 | 22,632 |
| Convertible senior notes, financing costs | 4,172 | 5,014 |
| Accumulated amortization of finite-lived intangible liability | $ 4,770 | $ 2,168 |
| Class A common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Class A common stock, shares authorized | 500,000,000 | 500,000,000 |
| Class A common stock, shares outstanding | 87,469,506 | 74,644,141 |
| Treasury stock, shares | 68,344 | 65,301 |