Earnings Per Share - Computations of Class A Basic and Diluted Earnings (Loss) per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
6 Months Ended |
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |
|
|
|
|
| Antidilutive securities excluded from computation of earnings per share |
8,600,000
|
8,100,000
|
400,000
|
8,500,000
|
| Numerator for basic and diluted earnings per share: |
|
|
|
|
| Net earnings attributable to controlling interest |
$ 32,718
|
$ 14,220
|
$ 168,640
|
$ 19,873
|
| Less: earnings allocated to participating securities |
(40)
|
(26)
|
(157)
|
(48)
|
| Numerator for basic EPS - net income attributable to common stockholders |
32,678
|
14,194
|
168,483
|
19,825
|
| Add back allocation of earnings to participating securities |
40
|
26
|
157
|
48
|
| Add back convertible senior notes interest |
0
|
0
|
7,480
|
0
|
| Reallocation of earnings to participating securities considering potentially dilutive securities |
(40)
|
(26)
|
(148)
|
(48)
|
| Numerator for diluted earnings per share - net income attributable to common stockholders |
$ 32,678
|
$ 14,194
|
$ 175,972
|
$ 19,825
|
| Denominator for earnings per share: |
|
|
|
|
| Class A common stock - basic (in shares) |
97,459,472
|
87,065,591
|
97,444,016
|
87,064,110
|
| Class A common stock - diluted (in shares) |
97,496,217
|
87,217,381
|
105,662,687
|
87,257,130
|
| Calculation of basic and diluted earnings (loss) per share: |
|
|
|
|
| Basic (in dollars per share) |
$ 0.34
|
$ 0.16
|
$ 1.73
|
$ 0.23
|
| Diluted (in dollars per share) |
0.34
|
0.16
|
1.67
|
0.23
|
| Dividends declared per Class A common share (in dollars per share) |
$ 0.42
|
$ 0.42
|
$ 0.84
|
$ 0.83
|
| Stock options |
|
|
|
|
| Denominator for earnings per share: |
|
|
|
|
| Add dilutive effect (in shares) |
0
|
7,488
|
0
|
0
|
| Restricted stock awards |
|
|
|
|
| Denominator for earnings per share: |
|
|
|
|
| Add dilutive effect (in shares) |
36,348
|
144,302
|
47,886
|
185,366
|
| Restricted stock units |
|
|
|
|
| Denominator for earnings per share: |
|
|
|
|
| Add dilutive effect (in shares) |
397
|
0
|
45
|
7,654
|
| Convertible senior notes |
|
|
|
|
| Denominator for earnings per share: |
|
|
|
|
| Add dilutive effect (in shares) |
0
|
0
|
8,170,740
|
0
|