Income Per Share and Partnership Unit - Schedule of Reconciliation of the Numerator and Denominator Used in the Computation of Basic and Diluted Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
| Basic and diluted income: |
|
|
|
|
| Net income |
$ 5,322
|
$ 27,399
|
$ 41,357
|
$ 96,458
|
| Less: income attributable to unvested restricted stock |
(265)
|
(192)
|
(682)
|
(430)
|
| Net income attributable to common stockholders used in basic and diluted income per share |
$ 5,057
|
$ 27,207
|
$ 40,675
|
$ 96,028
|
| Basic weighted average shares of common stock outstanding: |
|
|
|
|
| Weighted average shares of common stock outstanding |
458,035,972
|
480,326,857
|
473,919,177
|
457,992,378
|
| Less: unvested weighted average shares of restricted stock |
(1,364,355)
|
(772,495)
|
(1,220,485)
|
(728,852)
|
| Weighted average shares of common stock outstanding used in basic income per share |
456,671,617
|
479,554,362
|
472,698,692
|
457,263,526
|
| Net income per share attributable to common stockholders—basic (in USD per share) |
$ 0.01
|
$ 0.06
|
$ 0.09
|
$ 0.21
|
| Dilutive weighted average shares of common stock outstanding: |
|
|
|
|
| Convertible debt (in shares) |
0
|
972,054
|
0
|
0
|
| Weighted average shares of common stock outstanding used in diluted income per share |
456,671,617
|
480,598,610
|
472,698,692
|
457,301,623
|
| Net income per share attributable to common stockholders—diluted (in USD per share) |
$ 0.01
|
$ 0.06
|
$ 0.09
|
$ 0.21
|
| Potentially dilutive shares of common stock |
|
|
|
|
| Potentially dilutive shares |
0
|
181,667
|
32,150
|
121,230
|
| Unvested shares of restricted stock |
|
|
|
|
| Potentially dilutive shares of common stock |
|
|
|
|
| Potentially dilutive shares |
0
|
181,667
|
32,150
|
121,230
|
| Unvested performance shares |
|
|
|
|
| Dilutive weighted average shares of common stock outstanding: |
|
|
|
|
| Unvested performance share/stock options (in shares) |
0
|
67,506
|
0
|
33,938
|
| Stock options |
|
|
|
|
| Dilutive weighted average shares of common stock outstanding: |
|
|
|
|
| Unvested performance share/stock options (in shares) |
0
|
4,688
|
0
|
4,159
|