| Date | Acquired | Amount |
|---|---|---|
| Sep 25, 2017 |
|
Undisclosed amount |
| Oct 10, 2016 |
|
Undisclosed amount |
| Aug 30, 2015 |
|
Undisclosed amount |
| Aug 10, 2015 |
|
$ 590,000,000 |
| May 06, 2015 |
|
$ 32,500,000 |
| Feb 26, 2015 |
|
Undisclosed amount |
| Jul 01, 2014 |
|
$ 66,000,000 |
| Feb 16, 2012 |
|
$ 54,000,000 |
| Aug 05, 2011 |
|
Undisclosed amount |
