Earnings per Share (Schedule of Earnings per Share, Basic and Diluted, by Common Class, Including Two Class Method) (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 |
|
| Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items] | |||||||||||
| 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 |
| Weighted average common shares outstanding 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 |
| Incremental shares from unvested restricted shares | 0 | 2,451,903 | 2,869,490 | ||||||||
| Incremental shares from outstanding stock options | 0 | 97,491 | 26,095 | ||||||||
| Incremental shares from outstanding PBUs | 0 | 672,462 | 502,701 | ||||||||
| Weighted average common shares outstanding 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 |
| Basic (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 (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 |
| Common shares excluded from denominator as anti-dilutive (shares) | 195,252 | 34,058 | 3,505 | ||||||||
| Unvested restricted shares | |||||||||||
| Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items] | |||||||||||
| Common shares excluded from denominator as anti-dilutive (shares) | 177,663 | 34,058 | 3,505 | ||||||||
| Unvested PBUs | |||||||||||
| Schedule of Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items] | |||||||||||
| Common shares excluded from denominator as anti-dilutive (shares) | 17,589 | 0 | 0 | ||||||||