Income (Loss) Per Share and Partnership Unit - Summary of Reconciliation of Numerator and Denominator used in Computation of Basic and Diluted Net (Loss) Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
12 Months Ended |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Basic and diluted income: |
|
|
|
|
|
|
|
|
|
|
|
| Net loss from continuing operations |
|
|
|
|
|
|
|
|
$ (2,270)
|
$ (985)
|
$ (32,640)
|
| Gain (loss) on disposition of assets |
|
|
|
|
|
|
|
|
42,698
|
29,623
|
(61)
|
| Less: income attributable to unvested restricted stock |
|
|
|
|
|
|
|
|
(940)
|
(614)
|
(696)
|
| Less: dividends paid to preferred stockholders |
$ (2,530)
|
$ 0
|
$ 0
|
$ 0
|
|
|
|
|
(2,530)
|
0
|
0
|
| Income (loss) used in basic and diluted income per common share from continuing operations |
|
|
|
|
|
|
|
|
36,958
|
28,024
|
(33,397)
|
| Income used in basic and diluted income per share from discontinued operations |
$ (945)
|
$ (1,500)
|
$ 19,466
|
$ 19,699
|
$ 6,625
|
$ 22,580
|
$ 19,353
|
$ 20,250
|
36,720
|
68,808
|
125,913
|
| Net income attributable to common stockholders used in basic and diluted income per share |
|
|
|
|
|
|
|
|
$ 73,678
|
$ 96,832
|
$ 92,516
|
| Basic weighted average shares of common stock outstanding: |
|
|
|
|
|
|
|
|
|
|
|
| Weighted average shares of common stock outstanding |
|
|
|
|
|
|
|
|
469,212,533
|
470,023,674
|
433,361,726
|
| Less: unvested weighted average shares of restricted stock |
|
|
|
|
|
|
|
|
(1,277,588)
|
(805,898)
|
(1,138,773)
|
| Weighted average number of common shares outstanding used in basic income per share |
|
|
|
|
|
|
|
|
467,934,945
|
469,217,776
|
432,222,953
|
| Net income (loss) per share attributable to common stockholders - basic |
|
|
|
|
|
|
|
|
|
|
|
| Continuing operations (in dollars per share) |
|
|
|
|
|
|
|
|
$ 0.08
|
$ 0.06
|
$ (0.08)
|
| Discontinued operations (in dollars per share) |
|
|
|
|
|
|
|
|
0.08
|
0.15
|
0.29
|
| Net income per share attributable to common stockholders—basic (in dollars per share) |
$ 0.07
|
$ 0.01
|
$ 0.05
|
$ 0.03
|
$ 0.00
|
$ 0.06
|
$ 0.10
|
$ 0.05
|
$ 0.16
|
$ 0.21
|
$ 0.21
|
| Diluted weighted average shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Weighted average shares of common stock used in diluted income per share |
|
|
|
|
|
|
|
|
467,942,788
|
469,246,265
|
432,222,953
|
| Net income per share attributable to common stockholders - diluted: |
|
|
|
|
|
|
|
|
|
|
|
| Continuing operations (in dollars per share) |
|
|
|
|
|
|
|
|
$ 0.08
|
$ 0.06
|
$ (0.08)
|
| Discontinued operations (in dollars per share) |
|
|
|
|
|
|
|
|
0.08
|
0.15
|
0.29
|
| Net income per share attributable to common stockholders—diluted (in dollars per share) |
$ 0.07
|
$ 0.01
|
$ 0.05
|
$ 0.03
|
$ 0.00
|
$ 0.06
|
$ 0.10
|
$ 0.05
|
$ 0.16
|
$ 0.21
|
$ 0.21
|
| Potentially dilutive shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares |
|
|
|
|
|
|
|
|
65,480
|
119,633
|
662,213
|
| Unvested shares of restricted stock |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares |
|
|
|
|
|
|
|
|
65,480
|
119,633
|
339,541
|
| Unvested performance shares |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares |
|
|
|
|
|
|
|
|
0
|
0
|
319,288
|
| Stock options |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Potentially dilutive shares |
|
|
|
|
|
|
|
|
0
|
0
|
3,384
|
| Stock options |
|
|
|
|
|
|
|
|
|
|
|
| Diluted weighted average shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Dilutive weighted average shares of common stock |
|
|
|
|
|
|
|
|
0
|
3,835
|
0
|
| Unvested performance shares |
|
|
|
|
|
|
|
|
|
|
|
| Diluted weighted average shares of common stock |
|
|
|
|
|
|
|
|
|
|
|
| Dilutive weighted average shares of common stock |
|
|
|
|
|
|
|
|
7,843
|
24,654
|
0
|