| Date | Acquired | Amount |
|---|---|---|
| Nov 16, 2017 |
|
Undisclosed amount |
| Nov 16, 2017 |
|
Undisclosed amount |
| Jun 16, 2017 |
|
Undisclosed amount |
| May 02, 2017 |
|
Undisclosed amount |
| Feb 23, 2017 |
|
Undisclosed amount |
| Feb 10, 2017 |
|
$ 200,000,000 |
| Sep 19, 2016 |
|
Undisclosed amount |
| Sep 29, 2015 |
|
Undisclosed amount |
| Sep 11, 2015 |
|
Undisclosed amount |
| Dec 02, 2014 |
|
Undisclosed amount |
| Dec 01, 2012 |
|
Undisclosed amount |
| Oct 03, 2012 |
|
Undisclosed amount |
| Jul 24, 2012 |
|
Undisclosed amount |
| Jul 01, 2012 |
|
Undisclosed amount |
| Mar 20, 2012 |
|
Undisclosed amount |
| Jun 01, 2011 |
|
Undisclosed amount |
