Quarterly Consolidated Financial Data - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||||||||
| Revenues | $ 22,608 | $ 28,386 | $ 21,928 | $ 34,372 | $ 61,448 | $ 41,746 | $ 35,897 | $ 32,327 | |||||||||
| Income (loss) from operations | (149,272) | [1] | (180,272) | [1] | (107,462) | [1] | 8,172 | [1] | 37,063 | 20,413 | 12,539 | 8,497 | $ (428,834) | $ 78,512 | $ 18,764 | ||
| Income (loss) before provision for income taxes | (157,525) | (188,201) | (114,395) | 614 | 30,290 | 13,425 | 5,627 | 1,611 | |||||||||
| Net income (loss) | (157,525) | (188,201) | (114,395) | 614 | 30,290 | 13,425 | 5,627 | 1,611 | (459,507) | 50,953 | 49,342 | ||||||
| Dividend on preferred stock | 3,618 | 3,618 | 3,619 | 3,618 | 3,619 | 3,618 | 3,611 | 3,576 | |||||||||
| NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS | $ (161,143) | $ (191,819) | $ (118,014) | $ (3,004) | $ 26,671 | $ 9,807 | $ 2,016 | $ (1,965) | $ (473,980) | $ 36,529 | $ 39,964 | ||||||
| Basic (in dollars per share) | $ (2.07) | $ (2.47) | $ (1.52) | $ (0.04) | $ 0.35 | $ 0.16 | $ 0.03 | $ (0.03) | $ (6.11) | $ 0.58 | $ 0.66 | ||||||
| Diluted (in dollars per share) | $ (2.07) | $ (2.47) | $ (1.52) | $ (0.04) | $ 0.34 | $ 0.15 | $ 0.03 | $ (0.03) | $ (6.11) | $ 0.55 | $ 0.63 | ||||||
| Basic (shares) | 77,685,049 | 77,628,120 | 77,611,167 | 77,114,826 | 75,994,979 | 60,006,903 | 58,702,982 | 58,204,532 | 77,511,677 | 63,270,733 | 60,220,115 | ||||||
| Diluted (shares) | 77,685,049 | 77,628,120 | 77,611,167 | 77,114,826 | 78,577,762 | 63,399,446 | 61,922,874 | 58,204,532 | 77,511,677 | 66,492,589 | 63,618,401 | ||||||
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